all power are effected by temp. I recently discovered that gun powder is affected by temperature changes. Western Powders has really set the new standard in this regard. [email protected] Section 3 - CHEMWATCH 53687 Version No:4 CD 200814 2 of7 COMPOSITION 1 INFORMATION ON INGREDIENTS < 10 Section 4 - FIRST AID MEASURES SWALLOWED » - For advice, contact a Poisons Information Centre or a doctor at once - Urgent hospital treatment is likely to be needed. Initial Load Development: 300 Winchester Magnum Project March 25, 2016 Initial load development for a long range precision rifle can take shape in a variety of ways. I think you could squeeze another 25 fps or so using Retumbo but that will be a very compressed load, and IMR 7828 is too temp sensitive for me. Powder Temperature Sensitivity. 5 grains shot well, with no pressure signs, and 82 stuck the bolt. " It is the most clean burning, consistent 12 ga. went to 165 gr bullets and still could not get any speed or good accuracy neither weight shot good. Be careful at the temperature extremes! In addition do not use ball powders at very low load densities. There’s a temperature sensitive paint called Tempilaq that you brush onto a case before you heat it up. 5-300 Weatherby, 264 Win Mag, 28 Nosler and 300 Rem Ultra Mag, among other cartridges. In the cases investigated, barrel temperature is a much stronger variable than powder temperature. I described the typical hunting scenario we are involved with and they stated that 100V is not as temperature sensitive as IMR4350 (my powder choice for 40 years) but not as good as the extreme powders. My final load will use the Berger Bullets 210 grain Hunting VLD. By Chuck Hawks. But the Alliant bottle clearly says "consistent at all temperatures" in fairly visible letters on the front label. H4831 is not as temp sensitive it is in Hodges extreme line but it is different on the burn chart and will not give you the same accuracy. So, if ammunition is loaded with a double base, ball/spherical powder, it has all the right combinations to VERY temp sensitive. I used Nosler Accubonds in 180 grain. Retumbo adds 40-100 fps more velocity to these cartridges when compared to other normal magnum powders. Load up six rounds and put three in the refrigerator overnight and the other three put on the floorboard with the heater onshoot all six through the chrono and you will no how your powder does. Re22 would be on equal footing but its a bit temp sensitive and it gets COLD here in the winter. If sticky, you have exceeded where you want to be - in warmer temps the issues could be more severe if using a temp sensitive powder, and your brass will not last as long before the primer pockets start to open. I will tell you guys, I have experimented with Retumbo in my. Smokeless heavy magnum rifle powder. (This was at 30F ambient temp. Hodgdon's H4350 and H4831 are the least temp sensitive in the same cartridges above. It provides outstanding performance from the popular 7mm Rem Mag and 300 Win Mag through the Remington Ultra Mags and 338 Lapua. All we're sub 3/4 moa with Retumbo being just under 1/2 moa. Cordite, which was the common propellant at the time Rigby designed the case, was extremely sensitive to pressure fluctuations brought on by a change in temperature. 30-06 and. Likely go with the retumbo as it’s less temperature sensitive. Last fall I was working up loads with 160 Accubonds on my 7mag using both RL-22 and H4831SC for an elk trip. A Different type of Powder chart Here is a chart I made up, of the 140+ Us powders, it is current as of 2015. #2 what about the temperature sensitivity of the RL25, northern KY can be sub zero in winter and 100+ in summer, and with my work schedule, I'm liable to be itching to shoot in either if i have time away from work. have developed a comprehensive Reloading Guide to provide handloaders with current data for Accurate Powders. An excellent choice for lighter to. Finely got a little time to try CFE-223 powder in my Model 1 Sales 24” heavy barrel. I am one of them who don't like Retumbo in my 110BA, to dirty in the Big side) SAMMI spec chamber that Savages uses. My experience with the 16 has been really good or the rifle doesn't like it. Pressure sensitive is not atmosphere pressure tho it can be a concern in long range shootingpressure sensitive is a factor of the powders "potential" energy as change in pressure occurs, i. I will say it does keep the barrel clean. I'm about to use the last of it and am considering trying something else. 5-284 Norma. Likely go with the retumbo as it’s less temperature sensitive. Smokeless heavy rifle powder. Hodgdon's H4350 and H4831 are the least temp sensitive in the same cartridges above. This is a discussion on. retumbo This magnum, extruded powder was designed expressly for the really large overbored cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum, etc. N160 A slow-burning powder well suited to a broad. IE a load shot on a 60 degree day will be 40 fps faster than a load shot on a 20 degree day. Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. There weren’t many 7mm in the competition, but here are the powders represented. That's 60 fps for about a 50 degree temperature rise. There is a great deal of interest in. Silhouette shooters claim it is the most accurate 44 powder they have ever used. Cordite, which was the common propellant at the time Rigby designed the case, was extremely sensitive to pressure fluctuations brought on by a change in temperature. 2) Our shooter has loaded his ammunition with R/L #22, not the best powder choice when it comes to temperature sensitivity. 264 Win Mag built and I'm starting the process of choosing where to start with my load development. Buy the Hodgdon H1000 Rifle Powders and more quality Fishing, Hunting and Outdoor gear at Bass Pro Shops. Unsatisfied with current temperature testing methods, the authors have talked quite a bit about how to carry out a convincing experiment to test velocity variations over temperature but decided to start with an experiment testing velocity variations over different lots of. Just conducted a test this morning. Reloder ® 25 Rifle Powders. Also may test some CFE 223 as it appears to add about 100 fps or more and also try IMR 4166. 308, but doesn't do as well in some. It is simple to test, take five loads in a cooler out to the range on a hot summer day and record the average velocity of five hot shots and five cold ones. I found it in the 6. I'm looking for specific references OR experienes with IMR-4831 and IMR-4895 in temperatures under 32 degrees F. With a cock on closing design, it seems easier to feel differences in bolt lift. This advanced powder for big game hunting features improved slower burning and delivers the high. I have had problems in high temps with both ball and double base powders going overboard and popping primers, I learned, if you up your loads in hot temps, you won't get surprised when you switch from cold temps to. e barrel/projectile fit, length of bullet bearing surface, bullet weight, cold tight barrel to hot expanded barrel, etc. IMR7828 is slightly faster than H1000 and is more temp sensitive. Send Jeff Bartlet an email. Cordite, which was the common propellant at the time Rigby designed the case, was extremely sensitive to pressure fluctuations brought on by a change in temperature. the difference in my 243 at 50 degrees and at 15 below is around 500 fps. URP has a burn rate between 4350 and 4831. Rl-25 real close to 3300 fps. Decent accuracy. 300 Winchester Mag, MRP is an extremely versatile magnum powder. 300 off the lands and shot awesome. Powder Temperature Sensitive If this is your first visit, be sure to check out the FAQ by clicking the link above. The 338’s: RUM, Lapua, & Edge. Accurate Powder, now affiliated with Winchester, has brought out a new Spherical powder that has no other comparable burning rate powder in the U. 280 is the last load for the H4831. The retumbo is pretty close to max as I started getting sticky bolt/primer flattening around 78. 338 Lapua: 7828SC, H1000 & Retumbo. through powder measures, stability in severe temperature variation, and, most importantly, additional safety to the handloader. Mostly retumbo and H1000, supposedly not temp sensitive powders per hodgdon. That said,I just note what the temperature is when I do load testing,and adjust the loads when needed for different temperatures. Smokeless heavy magnum rifle powder. There’s a temperature sensitive paint called Tempilaq that you brush onto a case before you heat it up. But they fly true and the bc numbers are right on. Temperature sensitivity naturally depends very much on the weapon and on the cartridge. 25-06 Rem and a variety of belted Magnums. With a cock on closing design, it seems easier to feel differences in bolt lift. Full text of "Handbook Of Firearms And Ballistics Examining And Interpreting Forensic Evidence Developments In Forensic Science" See other formats. Viht N570 is the best powder for the stw but is very hard to find. Today, I tried shooting them, and discovered that I'm popping primers and getting extractor marks on the brass. If you want to get the best velocities, you should try RL26, retumbo, or 8133. include H4350, H4831, H1000, and Retumbo. 2gr in the hot weather but I can't say it was absolutely necessary. 20 fps isn't jack with the 28. 260 remington to shoot 123 class bullets at over 3200fps out of a 26in barrel. The 338 RUM, and 338 Edge (wich uses 300 RUM brass) can be had for around $80 for 100pc. Not to worry about temperature sensitivity all powders increase chamber pressure with an increase in temperature and decrease chamber pressure when temperature drops. Hodgdon lists as extreme powders: H1000, H50BMG, H4198, H322, H4350, H4895, H4831, H4831SC, Varget, Benchmark, and Retumbo. However, one point not yet mentioned, is that with temp sensitive powders, a load that works fine in moderate temperatures can be over-max in hot weather. I'm in the final stage of having a. 338 Lapua: 7828SC, H1000 & Retumbo. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Not sure how true that is. 300 win mag shooting 240 grain sierras, and i plan on wearing that barrel out with retumbo--in other words i like the powder. i use retumbo in my custom. Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. Re: Reloader 25 Temperature Sensitivity (???) Just wondering, but do you measure the distance form the chrono to muzzle everytime? If it is your hypothesis that there is a temperature sensitivity with the RL25, perhaps, I would recommend that you measure the temperature of the ammo just before you shoot and create a temperature curve, if it exists. I do not have my 90. Imr 7828 ssc temperature sensitivity keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. H4985 is AR2206H, H4350 is AR2209, Benchmark is Benchmark 2, H4831 is AR2213SC,H 1000 is AR2217,H4198 is AR2207 and Retumbo is AR2225. With a cock on closing design, it seems easier to feel differences in bolt lift. This advanced powder for big game hunting features improved slower burning and delivers the high. If you want to get the best velocities, you should try RL26, retumbo, or 8133. Thanks for the input. When you seat bullets, do they go in nicely and with similar force by feel?. The Latest In Reloading, Straight To Your Inbox Keep up-to-date on new products, trends and tips from the leader in reloading. These powder selections offer the least temperature sensitivity and will provide the most consistent velocities over an extreme range of temperatures. I then loaded 5 rounds each at half grain increments from 90 to 92. Best site for precision rifle accuracy and accurate shooting. It provides outstanding performance from the popular 7mm Rem Mag and 300 Win Mag through the Remington Ultra Mags and 338 Lapua. Using bullets from Swift SP, Hornady SP, Nosler Partition, Barnes Jacketed Round Nose. I had a delay fire in the subzero temps in 2007 with my 7mmMag (using Federal Mag Primers) that cost me my first elk. Retumbo gave good velocity but peaked very fast working up loads, good accuracy too. I recently discovered that gun powder is affected by temperature changes. All Temperature powders. I would like to start developing a load for my 7mag with a 26" barrel using 160 gr. I'm about to use the last of it and am considering trying something else. Thanks for sharing excellent data, Pudding+. I never tried Rl26 or any of the others you listed DF, sorry I can't help more with that. Loading density is perfect for magnums, contributing to superb uniformity. 338 LM) Reloader 25 is a bit too temp sensitive in my experience and too hot for a 225 gr bullet in. The manufacturing technique employed permits a very high bulk density, which in turn makes it possible to use a bigger charge in a certain limited loading volume. 68 RETUMBO. 5 Grain RSM/300 SMK/Lapua Brass/215M/2. In May, I judged them to be a group of unorganized women needy of my superhero Peace Corps volunteer powers (yet in hindsight I can acknowledge my own lack of:. Back in the summer I did some load development with Reloder-22. I'm currently using H4831 and H4831sc in my. If sticky, you have exceeded where you want to be - in warmer temps the issues could be more severe if using a temp sensitive powder, and your brass will not last as long before the primer pockets start to open. Some powders have large variances and others are formulated to be insensitive to heat and cold. Mostly retumbo and H1000, supposedly not temp sensitive powders per hodgdon. Do you pay attention to temp. is the most successful and popular of the Big. My rifle loved RL22 equally as well as Retumbo, and they were both very accurate with the obvious velocity advantage to Retumbo and the 72g load. This is because the surface of the powder has been treated with an agent designed to reduce barrel wear. Where can one find data on muzzle variation?. This magnum powder was designed expressly for the really large overbored cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum, etc. RL25 is temp sensitive, although not to the extent of IMR 4350. 49 RAMSHOT MAGNUM. Others have seemed to have different results. Achieve awesome ballistics with new Reloder® 26 from Alliant Powder®. Hodgdon Announces New Upgraded Hodgdon Load Data Center. O Scribd é o maior site social de leitura e publicação do mundo. The 7mm Remington Magnum is one of the great all-around rifle cartridges and the most popular magnum cartridge yet devised. Norma MRP is a magnum rifle powder that deserves a place on every handloader's shelf. 260 remington to shoot 123 class bullets at over 3200fps out of a 26in barrel. Temperature sensitivity naturally depends very much on the weapon and on the cartridge. Many of our readers have reported difficulty obtaining many of the popular Hodgdon powders such as H4895, H4350, and Varget. His is in 7mm, and mine in. all power are effected by temp. Like most 7mm Magnum cartridges, a bullet weighing around 150 grains is about optimum for all-around use in the 7mm Rem. But in some of the more over bore cartridges like our 7mm FX and 338 Lunatic, the likes of Vhit 20N29 and US869 will produce way more velocity for pressure than H50BMG. Achieve awesome ballistics with new Reloder® 26 from Alliant Powder®. IMR recommends always consulting www. Every powder in the Ramshot family is double-based and spherical shaped. Reloder ® 25 Rifle Powders. Hodgdon US 869 leads the way again by developing an outstanding 50 BMG propellant that offers significant advantages in many magnum rifle applications! US869 is a tr. 0 Grain velocities available at this time but I did chrony my 88. Brass for the Lapua is commonly found for around $195 for 100pc. An excellent choice for lighter to. These new IMR Enduron powders were designed to meet the same temperature independent requirements as the Hodgdon Extreme family of powders, which include: H4198, H322, BENCHMARK, H4895, VARGET, H4350, H4831, H4831SC, H1000, RETUMBO and H550BMG. Looking at rl33, n570, retumbo, h1000. 270 Winchester and the. AccurateShooter. I've used RL22 and it ran well in a 7RemMag but I went 2225 as it appeared to be more available (and it came in a 500g tin rather than the 1lb). retumbo® This magnum powder was designed expressly for the really large overbored cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum, etc. The case was specifically designed to fit long 200- to 225-grain bullets with the ideal amount of temperature stable powders, such as Retumbo and Reloader 26, while still working well with shorter, lighter bullets using 4831 and Reloader 23. There weren't many 7mm in the competition, but here are the powders represented. IMR 4166 performed very similar to Varget, and proved to be fairly insensitive to large swings in temperature. Well, here's some good news. These discriminating shooters encounter instances where temperature conditions play a major role in accuracy. Illustration courtesy of Hornady Mfg. locutus , May 9, 2015 locutus , May 9, 2015. H4350 and H4831sc both give excellent accuracy with less-than-average temp sensitivity and best-in-class ES and SD. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. 7 gr Retumbo-3175 FPS. These powder selections offer the least temperature sensitivity and will provide the most consistent velocities over an extreme range of temperatures. Might look for a pound of RL26 to see if they are in fact interchangeable. It is an ideal combination when used with the 270 Win,. This is a discussion on All Temperature powders within the Reloading forums, part of the Firearm Forum category; I was reading that temperature has little or no effect on these powders, H4198, H322, BENCHMARK, H4895, VARGET, H4350, H4831, H4831SC, H1000, RETUMBO and H550BMG,. Provides superb accuarcy in most medium and heavy rifle loads and is the powder of choice for. all my manuals only list 200 and 220 gr projectiles. The retumbo is pretty close to max as I started getting sticky bolt/primer flattening around 78. Then reading on the nosler forum someone suggested seating them to sammi specs and that was the ticket, I could put 4 bullets inside the circle the size of a quarter at 200 yards. Less temperature sensitive my h1000 load only has a 12 fps spread. The temperature of the ammunition can be a big variable. online i have seen people shooting around the 90 to 92 range but the closest my 7th edition harveys manual lists is 200grs with 81 to 86 grains. See what the best long range shooters in the country are reloading in their match ammo!. Plus, the case was only about half full or less. A question re - Powder Temperature You can specify your load's powder temperature at time you chronographed along with the variation of muzzle velocity (fps/mps) per degree (F/C) and the app will automatically adjust the muzzle velocity based on current powder temperature. Initial Load Development: 300 Winchester Magnum Project March 25, 2016 Initial load development for a long range precision rifle can take shape in a variety of ways. 338 calibre Hybrid projectiles. big advantage. Regarding temperature sensitivity, it isn't simple. [email protected] Section 3 - CHEMWATCH 53687 Version No:4 CD 200814 2 of7 COMPOSITION 1 INFORMATION ON INGREDIENTS < 10 Section 4 - FIRST AID MEASURES SWALLOWED » - For advice, contact a Poisons Information Centre or a doctor at once - Urgent hospital treatment is likely to be needed. Some powders will certainly give you increased pressure with higher temperatures, so it is a good idea to work up a load at, or near, the temperatures you plan to shoot the load. So, if ammunition is loaded with a double base, ball/spherical powder, it has all the right combinations to VERY temp sensitive. The manufacturing technique employed permits a very high bulk density, which in turn makes it possible to use a bigger charge in a certain limited loading volume. has any one used this powder with 140gr pills i am using vld thinking start load around 73gr and experience would be great. RSI keeps a copy up, so you can read it here. The only thing about either of these two powders & 300WM is that a pound just makes you want more. Reloder ® 19 Rifle Powders. [email protected] Section 3 - CHEMWATCH 53687 Version No:4 CD 200814 2 of7 COMPOSITION 1 INFORMATION ON INGREDIENTS < 10 Section 4 - FIRST AID MEASURES SWALLOWED » - For advice, contact a Poisons Information Centre or a doctor at once - Urgent hospital treatment is likely to be needed. he read it on the internet. Excellent consistency from batch to batch. Many of our readers have reported difficulty obtaining many of the popular Hodgdon powders such as H4895, H4350, and Varget. These discriminating shooters encounter instances where temperature conditions play a major role in accuracy. I found it in the 6. The Latest In Reloading, Straight To Your Inbox Keep up-to-date on new products, trends and tips from the leader in reloading. His is in 7mm, and mine in. The 338 RUM, and 338 Edge (wich uses 300 RUM brass) can be had for around $80 for 100pc. The case was specifically designed to fit long 200- to 225-grain bullets with the ideal amount of temperature stable powders, such as Retumbo and Reloader 26, while still working well with shorter, lighter bullets using 4831 and Reloader 23. Temperature sensitivity naturally depends very much on the weapon and on the cartridge. For two, there pretty clean burning powders, also pretty good for lot to lot consistency, (a lot better then RL25 anyways). That said,I just note what the temperature is when I do load testing,and adjust the loads when needed for different temperatures. And if you do a search here many many people are very happy with H-322. 2225 is Hogdon Retumbo and is one of their "Extreme" range of powders. 62mm NATO and the 6mm PPC. 375 Snipe Tac. As temperatures go up so does pressure. RETUMBO adds 40-100 fps more velocity to these cartridges when compared to other normal magnum powders. My rifle loved RL22 equally as well as Retumbo, and they were both very accurate with the obvious velocity advantage to Retumbo and the 72g load. Other Important Information:. #2 what about the temperature sensitivity of the RL25, northern KY can be sub zero in winter and 100+ in summer, and with my work schedule, I'm liable to be itching to shoot in either if i have time away from work. So for a long time now I have sworn off RL powders with the exception of RL 15 that I use in my 375 h&h and 416 rem. The burn rate of H1000 and RL22 is about perfect for the 300WM and 208/210 weight bullets. I then loaded 5 rounds each at half grain increments from 90 to 92. Sorry I don't have any 300 Win loads for you Allen, but if I had to make one up tomorrow H1000 is probably the first powder I'd try--mainly for being less temp sensitive than RL22 which I also liked a lot. Looking at rl33, n570, retumbo, h1000. I would like to know what 338 Lapua owners prefer, H1000 or Retumbo for 300smk's? Everthing that I could find seems to favor H1000. Alliant has also made great strides with their R series (Though R-17 is still sensitive). These powders will be more consistent and less temperature sensitive than the Imr powders. H110® is the spherical powder delivers top velocities with top accuracy in the 44 Magnum, 454 Casull, 475 Linebaugh and the 460 and 500 S&W magnums. So for a long time now I have sworn off RL powders with the exception of RL 15 that I use in my 375 h&h and 416 rem. There weren't many 7mm in the competition, but here are the powders represented. Might look for a pound of RL26 to see if they are in fact interchangeable. I never tried Rl26 or any of the others you listed DF, sorry I can't help more with that. Hodgdon & IMR Powders in Stock at Natchez. include H4350, H4831, H1000, and Retumbo. The 338's: RUM, Lapua, and Edge by Lucas Beitner. Retumbo, and. Unless these powders are hard to obtain in your location there is no reason not to start with one or the other. My load for my Rem700 300RUM is 92. The retumbo is pretty close to max as I started getting sticky bolt/primer flattening around 78. The effects of temperature sensitivity can cause a miss at long range, and unsafe pressures. I'm looking for specific references OR experienes with IMR-4831 and IMR-4895 in temperatures under 32 degrees F. By clicking the 'I Agree' button, I understand/accept and will agree to abide by the precautions and warnings outlined below. You may have to register before you can post: click the register link above to proceed. Powders temperature sensitivity as found by Ballistic XLR H50BMG 1. I am with Yorke on the 100v. I want to use either AR2217 (H1000) or AR2225 (Retumbo) Both these powders are temperature tolerant and readily available. From the standpoint of powder, the great leap forward is the inclusion of loads featuring Norma URP and Norma 217 where appropriate. Can't say I did a serious study. Unfortunately Varget and H4350 are still out, but Natchez has. I know or rather hear what is being said about powder sensitivity to temperature. The question is: should I clean up the powder shelf by just using H4350 or does R-19 provide a better alternative? I did notice that they sit very close on the powder burn rate chart. 68 RETUMBO. Reloder ® 25 Rifle Powders. So in my shooter app, If I check the powder temp box and it's 25* out then is reduces my velocity quite a bit. I have had problems in high temps with both ball and double base powders going overboard and popping primers, I learned, if you up your loads in hot temps, you won't get surprised when you switch from cold temps to. Viht N570 is the best powder for the stw but is very hard to find. In the cases investigated, barrel temperature is a much stronger variable than powder temperature. Temp sensitive powders I’m interested to hear others thoughts on temperature sensitivity of certain powders. 338 calibre Hybrid projectiles. RL15 sucks when it comes to temp sensitivity. I think your right on concentrating around H1000/RL25/Retumbo. Retumbo seems sensitive to starting pressure, so neck tension, distance to lands (which may be moving away), and neck cleanliness can cause ES. 21 MAG PRO 1. Norma MRP is a magnum rifle powder that deserves a place on every handloader's shelf. These discriminating shooters encounter instances where temperature conditions play a major role in accuracy. the difference in my 243 at 50 degrees and at 15 below is around 500 fps. There are a ton of guys who love the stuff but I've never liked the Reloader series of powders due to their temperature sensitivity. These powder selections offer the least temperature sensitivity and will provide the most consistent velocities over an extreme range of temperatures. I sold the rest of it. Illustration courtesy of Hornady Mfg. I've noticed that some chronographs are sensitive to gas or shock wave from the muzzle. The load I used this year was with RL26 and it's pushing 180vld's @ 2950fps. all my manuals only list 200 and 220 gr projectiles. Confirm this if you can: IMR powders are temperature sensitive. retumbo is a bit slower so it depends on what weight bullet your shooting, on a wag I would opt for H1000, then try retumbo both are in the hodgdon extreme powder line, meaning they are single based and not as temp sensitive, however be advised even the extreme powders will speed way up if you leave your ammo cook in the sun, or leave it on the dash in your truck when its warm, but not as bad. (CAL), a large caliber ammunition facility with two plants. With a cock on closing design, it seems easier to feel differences in bolt lift. You may have to register before you can post: click the register link above to proceed. MK 248 MOD 1 specs. Where I hunt I've never particularly worrled about the temp sensitivity issues (if any) with RL22. through powder measures, stability in severe temperature variation, and, most importantly, additional safety to the handloader. Last fall I was working up loads with 160 Accubonds on my 7mag using both RL-22 and H4831SC for an elk trip. The rifle I use IMR 4831 on is a 280ai that shoots Barnes TSX’s very well. I have read about temperature sensitivity and suspect that as the culprit. That is very, very low. Noslers is overstated. RL25 I understand can be a touch temperature sensitive so the ADI would win that race. Has anyone tried any of the surplus powders in these? Of the powdersI have on hand, 5010, 7383, and Data 86 seem the most likely. Temperature sensitivity naturally depends very much on the weapon and on the cartridge. The loaded ammo reacts differently to temperature. But if I was pinned down and could have only one combo for the 7mag it would probably be 7828 and fed mag primers. WST pistol powder is known to be reverse temperature sensitive but i like it anyway I was talking to a hogdon tech a few years ago, and he told me how they accidentally discovered that VARGET was very temperature stable typically IMR stick type powders are more temp stable than ball powders like BLC2, win748 etc. " Powder Heat Sensitivity Comparison Test Cal Zant of the Precision Rifle Blog has published a fascinating temp-stability comparison test of four powders: Hodgdon H4350, Hodgdon Varget, IMR 4451, and IMR 4166. I got that from marrying up the charge weights with velocity from both their websites. Silhouette shooters claim it is the most accurate 44 powder they have ever used. temperature stability, N150 is a tremendously versatile powder. went to rl 19 in desperation dad had some and with the 165 hornady gmx it shoots good and im getting 3450. And if you do a search here many many people are very happy with H-322. There’s a temperature sensitive paint called Tempilaq that you brush onto a case before you heat it up. 0 Grain velocities available at this time but I did chrony my 88. retumbo This magnum, extruded powder was designed expressly for the really large overbored cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum, etc. This is because the surface of the powder has been treated with an agent designed to reduce barrel wear. I have had problems in high temps with both ball and double base powders going overboard and popping primers, I learned, if you up your loads in hot temps, you won't get surprised when you switch from cold temps to. I described the typical hunting scenario we are involved with and they stated that 100V is not as temperature sensitive as IMR4350 (my powder choice for 40 years) but not as good as the extreme powders. In the near future I plan on getting some MagPro powder to try. Natchez Shooters' Supply recently received a large shipment of Hodgdon powder. Home; web; books; video; audio; software; images; Toggle navigation. * (See burn rate chart. A Different type of Powder chart Here is a chart I made up, of the 140+ Us powders, it is current as of 2015. Every powder has some measurable temp sensitivity, including H4350 and Varget. Unsatisfied with current temperature testing methods, the authors have talked quite a bit about how to carry out a convincing experiment to test velocity variations over temperature but decided to start with an experiment testing velocity variations over different lots of. IMR Enduron 8133 is the slowest burn rate in the Enduron family. 50 BMG than the VhitiVouri 20N29. The 338’s: RUM, Lapua, and Edge by Lucas Beitner. I've used RL22 and it ran well in a 7RemMag but I went 2225 as it appeared to be more available (and it came in a 500g tin rather than the 1lb). Specific cartridge loads need specific propellant to perform to their ballistic peak. They were both giving me about the same group size and the RL-22 was about 150ft/sec faster so I was leaning toward the RL-22 but I was concerned about the temperature issues so I ran a little test. To maximize performance, the ballistics experts at Western Powders, Inc. I was always trying to push the envelope using new brass to get super sonic velocity at one point. I can understand grease and oil (lubricants) being affected by temperature. Maybe Retumbo is to slow, but I would give it a try. range of Magnums, and large capacity/small bore cartridges like the 6. The manufacturing technique employed permits a very high bulk density, which in turn makes it possible to use a bigger charge in a certain limited loading volume. 260 remington to shoot 123 class bullets at over 3200fps out of a 26in barrel. IMR recommends always consulting www. My other ultra mag that I used to own liked 94 grains of retumbo shooting 210 berger vld. CLAYS® Introduced in January 1992, CLAYS has "taken the clay target world by storm. I have read about temperature sensitivity and suspect that as the culprit. 68 RETUMBO. This bullet proved easy to get shooting well. Hodgdon lists as extreme powders: H1000, H50BMG, H4198, H322, H4350, H4895, H4831, H4831SC, Varget, Benchmark, and Retumbo. 2gr in the hot weather but I can't say it was absolutely necessary. Benchmark is one of the Hodgdon Extreme line, which all have a special low temperature sensitivity formulation, while CFE223 is not. They're "less" sensitive. The retumbo is pretty close to max as I started getting sticky bolt/primer flattening around 78. Either works great with whatever bullet I have tried, just have to try a couple different loads to see were the best accuracy is at. I found it in the 6.