Rl 33 Vs Retumbo

I stayed with retumbo (96. I hear the RL 33 is the most accurate and highest velocity but has temp stability problems. 338 Remington Ultra Magnum Rifle Cartridge by Nosler Inc. I've used RL-26 in 4 mag cartridges and in all 4 I found the burn rate to be between RL-22 and RL-25, but closer to RL-22. I decided to develop a load for my TRG with the Hornady 285 ELD-M and Retumbo , and settled on the longest feed-able length I could make work reliably - 3. 172" Diameter. Any of my search term words; All of my search term words. Both fired at Hodgy max velocity from a 300 WM. Benchrest, F-Class, Tactical, Varmint, High Power precision Shooting. Not on the Norma website and not in my Sierra, Hornady or ADI manuals. RL-33 For use in. The propellant's burn speed falls between that of Reloder® 22 and Reloder® 33, and it incorporates EI® technology to produce extremely high velocities in magnum cartridges. If you take xx. During that time, Hodgdon has modernized H4350 by shortening the grains for improved metering and making it insensitive to hot and cold temperatures. 300 Remington Ultra Magnum, and 28 Nosler, among others. 338 Edge (300 GR Berger Bullets Data) reloading data with 16 loads. You may even go as fast as 7828. GunBot does not endorse any of the retailers or products listed. I would expect to see that added in the next few weeks as the powder gets closer to shipping. I've only shot a little RL-33 but it should be faster based on my testing with the 180's. Having read the other reply by Knight Driver I will narrow down the mystery of the barrel burner syndrome tag given to the 264 some many years ago. 5 grs produced an average MV of 2542 fps, ES 74 and SD 26. 5-300 Weatherby Magnum reloading data with 357 loads. Alliant just released RL-23 and RL-26 that have similar burn rates as 22 and 25, but are supposed to be much less temperature sensitive. I use N570 in my 6. Yep, there is the nominal 0. 250 Grain 300 Grain. I've got Retumbo, H4831 and IMR 7828SSC. Call if you have any questions about the store checkout process. I will try going up and see what happens. 33 Hodgdon UNIVERSAL 83 Hodgdon H335 133 Alliant Reloder 22 34 IMR UNEQUAL 84 Ramshot X-Terminator 134 VihtaVuori N560 35 Alliant Power Pistol 85 Accurate Arms 2230 135 VihtaVuori N165 36 Vihta Vuori N330 86 Accurate Arms 2460s 136 IMR 7828 & IMR 7828 SSC 37 Alliant Herco 87 IMR 8208 XBR 137 Alliant Reloder 25. 338 Lapua Mag and the Remington Ultra Magnums, Norma 217 offers unparalleled velocity and accuracy. 2 3064 *RL 22 58. 338 Remington Ultra Mag. Tried RL-33 in a few rifles this moly 162 A-max 72 gr of Retumbo 2975 fps RL-33: I read that Alliant was going to import RL-33 which is a magnum version with. I may have a 300 weatherby in the works. Those monster cases need a slower powder than 4831 but It will do if that is all you have. Norma is known for a longstanding history of quality ammunition and the best precision products for hunting, shooting and home defense. Slower burning powders and high load densities will yield great loads. If you want to lower pressures more I think the 28 Nosler should get you 2800 using retumbo and even more with RL33. Reloader 33 came out after I sold the rifle, so I never got a chance to use it. I'm focusing on H1000 and Retumbo from past experience, anyone have any suggestions. We have Nosler AccubondLR 129gr and Swift Scirroco 130gr bullets and Reloader 33, Retumbo, H50BMG, etc. It so far has worked good in every gun we tried it in. I would caution you to start even lower than 66 grs of Retumbo with your 140's. That said, the reward can be much greater if you take the time to really dial in the optimum load for your rifle. I am using retumbo now in my 338 lapua until Reloader 33 comes to Fairbanks Alaska I have some of the new 300 gr Bergers elite hunting bullets and a pile of Hornady brass with Fed 215M primers. This is 100 fps better than our best Retumbo load. Specific cartridge loads need specific propellant to perform to their ballistic peak. Dealer pricing available. The slower burning rifle powders are a natural choice for the. 338 Lapua Mag. Any other powder conversions from Norma to Alliant/RL seconds of which you know? I have the Norma Manual No. Now to my gunpowder choice. Nosler - Bullets, Brass, Ammunition & Rifles. Thinking you will gain a bit more vel and better consistency than the 869. Any of my search term words; All of my search term words. My gun shot the Retumbo and H1000 real good. Alliant Reloder 33 is a new powder created by Rheinmetall Nitrochemie in Switzerland (Nitrochemie also makes Reloder 17). Every day, Reloading Unlimited works tirelessly to be your go-to reloading components and reloading supplies company. Very good accuracy and velocity. AccuBond® Long Range Bullet Information. Seems to run just at 2670 to 2710 depending on ambient temp and is quite accurate and keeps the SD and Extreme Spread in velocity quite low. These all-around smokeless powders are among the most versatile shotgun/handgun and rifle powders available. I've been hearing about this new bullet coming out for some time and since it has I decided to test it out. 35 Whelen noticeably superior to the. I've used RL-26 in 4 mag cartridges and in all 4 I found the burn rate to be between RL-22 and RL-25, but closer to RL-22. I will be the first to. Most folks haven’t seen these Reloder powders because it took quite a while for the first shipments of RL 23 and. Remington 700 action. I've noticed that RL-33 is a relatively new primer and en vogue to use in the ultra-mags. I will be using 140gr accubonds. I think the new slow Enduron powder (7977?) would work well too. 205 CASE TYPE: CASE HOLDS: 96. 338 Lapua Mag. Here are some of the particulars. H1000 shoots best for me vs Retumbo or rl33 300 Hybrid. 9 max for 180 gr. The company states the burn rate compares closely to that of the Hodgdon Retumbo powder. Jeffvn]Yes the H1000 and Retumbo were the best in mine for accuracy. 1 edition, will be wanting the latest also. You may even go as fast as 7828. 7 Comments. Rl17, 33, and 50 are made by Nitrochemme, not Norma as the other rl powders are and they are doing some things differently chemically than a normal double base so I doubt any Norma made rl powder will compare directly. Those monster cases need a slower powder than 4831 but It will do if that is all you have. Can't help you with your question but I am happy with Retumbo and 300 grain smk. of water (5. 5 grains with 250 SMK = 2925 fps Hodgdon 4831SC 87. 264 WM as well. Most of the bullets in. I am not familiar with your cartridge, but if you can, try a pound of each to see what your barrel likes. There are too many unknown variables, bore condition, crown condition, twist rate. Sources such as Lyman and Weatherby's pressure rating suggest maximum average pressure limit of 66,000 psi (4,600 bar). " That is also very good to know, URP is a very useful and highly efficient powder choice for many cartridges. I've noticed that RL-33 is a relatively new primer and en vogue to use in the ultra-mags. 257 Weatherby Magnum has a case capacity of 84 gr. Some people have started using RL-33, but that seems like it would be a bit slow to me, but I shoot lighter, faster bullets as my preference for ELR in a Lapua as a balance between velocity, efficiency, and accuracy. Alliant Reloder 33 is a new powder created by Rheinmetall Nitrochemie in Switzerland (Nitrochemie also makes Reloder 17). 257 Weatherby Magnum to a maximum average pressure of 4,400 bar (64,000 psi). If I can't find someone who's tried it I'll go with starting loads somewhat like Retumbo. Powders with slow burn rates and high load densities will work best. Best site for precision rifle accuracy and accurate shooting. 9 2772 Retumbo 81. Looking for a 1-pound quantity of Hodgdon smokeless powder? Check out Midsouth's selection! We offer Hodgdon powder for sale at great prices to enhance your reloading experience. I stayed with retumbo (96. This new powder is designed for large, magnum cartridges, such as. RL-33 For use in. I just need a couple days to start over with load work up and have not had time. The H1000 and Retumbo worked best for me pushing 300 SMKs. Some people have started using RL-33, but that seems like it would be a bit slow to me, but I shoot lighter, faster bullets as my preference for ELR in a Lapua as a balance between velocity, efficiency, and accuracy. Looking for a 1-pound quantity of Hodgdon smokeless powder? Check out Midsouth's selection! We offer Hodgdon powder for sale at great prices to enhance your reloading experience. • Always look for signs of excessive pressure. 338 Lapua Mag within the Reloading forums, part of the Sniping Related category; RL-33 was supposedly designed for 338LM, so I'm betting you'll find some good start loads on the bottle. I know from some work I have done with. Powders include IMR, Norma, Alliant, Accurate, Hodgdon, Ramshot, Vihtavuori. Pretty consistent velocities seen, but while chronographing any rounds sitting in the warmed rifle chamber indicated higher velocities, and I had to get ammo and rifle consistent temp for consistent velocity. I tested RL 33 in the 338 RUM with the 300 gr AB with disappointing results. I called Ben Ammonette, Alliant powder, last week and asked what is holding up delivery of RL-33. The 7mm RUM is based on the. It is a unit of measurmentone that EVERYBODY uses. I would expect to see that added in the next few weeks as the powder gets closer to shipping. Hello jeff; I am currently doing load workup on my 264 Win mag Model 70 Winchester Westerner with the same bullet. We have Nosler AccubondLR 129gr and Swift Scirroco 130gr bullets and Reloader 33, Retumbo, H50BMG, etc. Some people have started using RL-33, but that seems like it would be a bit slow to me, but I shoot lighter, faster bullets as my preference for ELR in a Lapua as a balance between velocity, efficiency, and accuracy. 3 3227 *US 869 84. moly'ed 162A-max with case as full as possible using a drop tube only duplicated the existing load with Retumbo. Slow them to 30-06 speeds, and the bullets are identical. I was a little surprised because it seems pretty slow for that. 338 RUM and. Reloder 33 Powder 97. Second group went. A main feature of both the Remington and Winchester magnums was a rebated rim, allowing these cartridges to work with existing magnum bolt faces. In some cartridges, Reloder 17 delivered significantly more velocity than any other propellant on the market. 5 grains with 300 SMK = 2790 fps Reloder 33 Powder 103. 143 over SAAMI, ~0. Retumbo under a 300 Sierra HPBT in my Armalite 338 Lapua and find it to be quite accurate. We changed the wooden stock that came with it, and installed the barreled action into an H-S Precision stock. There are too many unknown variables, bore condition, crown condition, twist rate. So don't say" you're asking for load info on the Internet". I've used RL-26 in 4 mag cartridges and in all 4 I found the burn rate to be between RL-22 and RL-25, but closer to RL-22. Note: This table shows only approximate equivalent values within about 5%. Start your Norma adventure now!. Now I haven't loaded with RL15, RL22, or RL25 but people that have down here in the hot Texas summer tell me that those 3 powders are pretty damn temperature sensitive too. 7 Comments. Hornady book says 85. I haven't had any Luck finding RL-16 or RL-33 Retumbo is good starting at 84 grains working upward to 86 gr. I am going to run 300 gr. This advanced powder for big game hunting features improved slower burning and delivers the high energy that heavy magnum loads need. MAGNUM is the ultimate high performance magnum rifle powder. *Most Accurate Load C Compressed Load 2 140-grain Match Burner Sectional Density. " That is also very good to know, URP is a very useful and highly efficient powder choice for many cartridges. Could someone chime in with load data for a 300 RUM. I will try going up and see what happens. They are listed in order from the fastest burning to the slowest burning. 600” 127-grain LRX BT. There is a great deal of interest in. 2 POWDER MUZZLE VEL. The company states the burn rate compares closely to that of the Hodgdon Retumbo powder. 5 grains with 300 SMK = 2790 fps Reloder 33 Powder 103. Powders include IMR, Hodgdon, Alliant, Norma, Accurate, Ramshot, Vihtavuori, Winchester. VV-170 and VV-N570 will work. The priming mix is specially formulated for consistent ignition with a wide variety of powder types, and tested for reliability over a temperature range of -20°F to +150°F. I've been handloading, shooting and hunting with a. MAGNUM is the ultimate high performance magnum rifle powder. Reloader 25, Retumbo, H870 (spherical) and H50BMG are suitable burn rates however H50BMG is somewhat course in kernel structure and most likely has abrasive qualities when squeezed through the small. Any other powder conversions from Norma to Alliant/RL seconds of which you know? I have the Norma Manual No. Other Weatherby factory loads include the 130 grain Hornady Interlock at 3375fps, the 130 grain Nosler Partition also at 3375fps, the 130 grain TSX at 3400fps, the 140 grain Nosler Ballistic Tip at 3300fps, the 140 grain Accubond at 3320fps, the 150 grain. Questions before buying savage 110 ba stealth 338 RL 33 is better than Retumbo. 338 Lapua Mag and the Remington Ultra Magnums, Norma 217 offers unparalleled velocity and accuracy. 338 Lapua, although it is also ideal for a range of large magnum rifle cartridges. We’ve told fans of Hodgdon H4350 to give Alliant Reloder 16 (RL16) a try. 358" Diameter. 1 edition, will be wanting the latest also. The H1000 and Retumbo worked best for me pushing 300 SMKs. Looking for 4350 from Hodgdon, 4895 from IMR, #26 from Alliant, Accurate 2200, or Vihtavouri's 320?. " That is also very good to know, URP is a very useful and highly efficient powder choice for many cartridges. It provides outstanding performance from the popular 7mm Rem Mag and 300 Win Mag through the Remington Ultra Mags and 338 Lapua. Smokeless gunpowder for reloading from the best manufacturers. As for Retumbo The load data on Nosler says it is slightly slower, but I will take accuracy over speed. It dropped right back to 2960 again. I'm still trying to get ahold of some RL-33 to give it a test. 143 over SAAMI, ~0. Playing with it out to 600 yards I'm figuring the B. 5 Sherman with 140 berger, and I have to say I used this as Retumbo speed was not there for me( great accuracy from Retumbo but a fair bit slower), and the temp stability on RL powders I am not a fan of. 8 2970 Power Pro 4000-MR 57. Consider Alliant Reloder 26 for Magnum Cartridges. 5 grs produced and Average MV of 2666 fps, ES 14 and SD 8. Prior to throating I shot RL 33 at 104. So let's look at the "melty tips". It usually gives about 100 to 150 more fps then H1000 and Retumbo. • Burn rates are not linear- meaning- the relative quickness between powders listed by each other in the chart may be nearly the. This advanced powder for big game hunting features improved slower burning and delivers the high energy that heavy magnum loads need. 300 Winchester Magnum reloaders, and with good reason. Specific cartridge loads need specific propellant to perform to their ballistic peak. Does anyone have the Berger minimum and maximum load data for the bullet and powder?. Very good accuracy and velocity. I usually only fire 2 rounds then let the thin barrel cool off. (Retumbo, Reloader25) at 75. Thinking you will gain a bit more vel and better consistency than the 869. RL-33 For use in. Alliant just released RL-23 and RL-26 that have similar burn rates as 22 and 25, but are supposed to be much less temperature sensitive. My gun shot the Retumbo and H1000 real good. As far as loads, 3100fps is starting load for 100gr with H1000, so your friend is starting on the safe side. This is a discussion on RL-33 For use in. I've been playing with Retumbo, RL-25 and RL-33 in my 264 Win. 3 3227 *US 869 84. The only problem is to find the stuff. Not on the Norma website and not in my Sierra, Hornady or ADI manuals. 9 max for 180 gr. I'm focusing on H1000 and Retumbo from past experience, anyone have any suggestions. It usually gives about 100 to 150 more fps then H1000 and Retumbo. moly'ed 162A-max with case as full as possible using a drop tube only duplicated the existing load with Retumbo. Way to get er done! Congratulations. The accuracy wasn't terrible. A change in temperature can affect the trajectory or 'flight path' of the bullet in two well-known ways: So long as altitude, barometric pressure and humidity remain constant, an increase in air temperature will cause a flatter trajectory due to a lower air density (less collisions with 'air particles' per unit length of flight path). Nosler guarantees each Model 48 Patriot to produce a. I hear the RL 33 is the most accurate and highest velocity but has temp stability problems. Every day, Reloading Unlimited works tirelessly to be your go-to reloading components and reloading supplies company. My gun shot the Retumbo and H1000 real good. 35 Whelen (and. Having read the other reply by Knight Driver I will narrow down the mystery of the barrel burner syndrome tag given to the 264 some many years ago. We have Nosler AccubondLR 129gr and Swift Scirroco 130gr bullets and Reloader 33, Retumbo, H50BMG, etc. 143 over SAAMI, ~0. I would caution you to start even lower than 66 grs of Retumbo with your 140's. But for my money I'd lose a tiny bit of speed for temp stability and use Retumbo. NEVER USE THESE TO DETERMINE/CALCULATE LOADS - ALWAYS REFER TO REPUTABLE LOAD GUIDES/MANUALS. The creation of the. 257 Weatherby Magnum has a case capacity of 84 gr. 300 Remington Ultra Magnum (1999) which is in turn based on a grossly modified version of the unbelted 404 Jeffery's case. As for Retumbo The load data on Nosler says it is slightly slower, but I will take accuracy over speed. Looking for a 1-pound quantity of Hodgdon smokeless powder? Check out Midsouth's selection! We offer Hodgdon powder for sale at great prices to enhance your reloading experience. Which is only 5 but all five did better. Any more powder and the bolt lift is getting pretty noticeable in the Stiller action. 338 Lapua Magnum Powder Minimum Maximum Charge (grains) Velocity (fps) Charge (grains) Velocity (fps) IMR 7828SSC 74. Group went. 35 Whelen noticeably superior to the. I've used RL-26 in 4 mag cartridges and in all 4 I found the burn rate to be between RL-22 and RL-25, but closer to RL-22. I've noticed that RL-33 is a relatively new primer and en vogue to use in the ultra-mags. I usually only fire 2 rounds then let the thin barrel cool off. 28 Nosler handload data. Retumbo has temp control and I’ve heard it has decent accuracy and velocity. 5 grains with 250 SMK = 2925 fps Hodgdon 4831SC 87. Has anyone built one before. The Alliant Powder family of products is one of the broadest and most trusted name in the reloading business. 30-378 Weatherby utilizes charge weights of between 100 and 120 grains of ultra slow burning powder. (Retumbo, Reloader25) at 75. I emailed alliant themselves and they don't have load data for it YET. Most folks haven't seen these Reloder powders because it took quite a while for the first shipments of RL 23 and. The discussion states that when Hodgdon decided to discontinue H-4227 and only market the IMR- version, they continued acquiring it from ADI, but had ADI coat it in graphite to make it black like the "old" IMR powder. I haven't had trouble with rl 22 and 25. It provides outstanding performance from the popular 7mm Rem Mag and 300 Win Mag through the Remington Ultra Mags and 338 Lapua. This is a discussion on Reloder 33 and 338 lapua reloading within the Reloading forums, part of the Sniping Related category; My 338 lapua should be in soon I have 8lb jug of r-33 I could not find retumbo or h1000 anyhwere I do have 1lb. 5 grains at a speed of 2800 fps with RL 22. US869 is a dense propellant that allows the shooter to use enough powder to create maximum velocities in cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum and others. Could someone chime in with load data for a 300 RUM. But this is only my experience and your results may vary. Some people have started using RL-33, but that seems like it would be a bit slow to me, but I shoot lighter, faster bullets as my preference for ELR in a Lapua as a balance between velocity, efficiency, and accuracy. Questions before buying savage 110 ba stealth 338 RL 33 is better than Retumbo. 338 Edge; both were very accurate, '25 produced faster velocities. From a sandbag rest,. IMR, a Hodgdon Powder Company brand, will soon release a new, slow-burn-rate magnum powder, IMR Enduron® 8133. As for powder RL 33 is excellent with 300 Grain Accubonds I have been using this powder for about a year now in my AR 30. IMR expects to begin shipping 8133 in February of 2018. 358" Diameter. 338 Lapua Mag within the Reloading forums, part of the Sniping Related category; Has anyone used RL33 powder in there 338 and if so what was your load and results of that load. Jeffvn]Yes the H1000 and Retumbo were the best in mine for accuracy. I've been hearing about this new bullet coming out for some time and since it has I decided to test it out. What would you guys choose? I plan on shooting both to see but if it's not worth the temp stabilty maybe I shouldn't even try the RL 33 in fear of liking the results haha. Find what you need in four easy steps. 338, RL 19 would probably be better, maybeso even RL 22, but RL 17 should still be pretty decent. We installed a Leupold 4. Powders with slow burn rates and high load densities will work best. Back to Reloading Data. Nosler - Bullets, Brass, Ammunition & Rifles. VV-570 and RL-33 are not particularly temp stable. 338 Lapua, there exist about a dozen various cartridges capable of exceptional accuracy and long-range performance. This is specifically due to high BC mass produced bullets available. You may even go as fast as 7828. Using 300 grain Bergers my 30" 338LM ended up at 102. 5 grs produced and Average MV of 2666 fps, ES 14 and SD 8. Cartridge: The 7mm Remington Magnum centerfire rifle cartridge is a. Like Reloder 17, Alliant's new Reloder 33 powder employs a proprietary. Both fired at Hodgy max velocity from a 300 WM. You’ve probably heard of Allliant Reloder 22 powder, but how about Reloder 23? Or Reloder 26? These two new European-produced Reloder propellants were introduced in 2014. Hey fella's, I'm looking for some load data on the. So Norma-203B is "RL-15 Primo," and Norma-URP is "RL-17 Primo. I haven't had trouble with rl 22 and 25. 338 Remington Ultra Mag. 2 3237 H50BMG 76. Reloder 33 and 338 lapua reloading. 58 x 70 mm) is a specialized, rimless. Toggle 91grs of RL 33 with 129gr Nosler LRA. 338 Remington Ultra Mag. Comparative Powder "Burning Rates" The chart below lists powders currently and commonly available in the US. Reloading Supplies and Equipment. Now, if Weatherby would just produce the brass and ship the guns we could have a fun spring project. I just need a couple days to start over with load work up and have not had time. It all depends on the rifle but in my 264 Win mag I use 130 gr Accubonds and 67 grs is too hot. 28 Nosler with 175 Grain ELD-X Test (some graphic photos are included) Posted by Lloyd Hill on 05/12/2016. I get 3150 fps easy with RL 33 and 140 accubonds and great accuracy. I've been playing with Retumbo, RL-25 and RL-33 in my 264 Win. View list of retailers. 9 max for 180 gr. Provides superb accuarcy in most medium and heavy rifle loads and is the powder of choice for. As for powder RL 33 is excellent with 300 Grain Accubonds I have been using this powder for about a year now in my AR 30. I decided to develop a load for my TRG with the Hornady 285 ELD-M and Retumbo , and settled on the longest feed-able length I could make work reliably - 3. I'm focusing on H1000 and Retumbo from past experience, anyone have any suggestions. WARNING: The load information on this page is for my personal use in my personal firearms and is posted for entertainment purposes only. 8 2970 Power Pro 4000-MR 57. NEVER USE THESE TO DETERMINE/CALCULATE LOADS - ALWAYS REFER TO REPUTABLE LOAD GUIDES/MANUALS. I am not sure that anyone has positively documented that RL 33 is that temp sensitive. Which is only 5 but all five did better. Gun Expert Bryce Towsley provides advice and tips on handloading for the. GunBot does not endorse any of the retailers or products listed. Hodgdon Smokeless Powder 8 LBS, Reloading Equipment, Tools, Components, and Accessories: Midsouth Shooters offers a great selection of Hodgdon Smokeless Powder 8 Lbs for your reloading needs. There is a great deal of interest in. Using 300 grain Bergers my 30" 338LM ended up at 102. IMR expects to begin shipping 8133 in February of 2018. • Burn rates are not linear- meaning- the relative quickness between powders listed by each other in the chart may be nearly the. October 24th, 2013 When Will Your Barrel Die? Spreadsheet Predicts Barrel Life. The following loads were developed in a Remington Model 700 Sendero rifle. I've used RL-26 in 4 mag cartridges and in all 4 I found the burn rate to be between RL-22 and RL-25, but closer to RL-22. Prior to throating I shot RL 33 at 104. 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. Alliant Powder, Steel, 4lb. Accuracy is the same as we were getting with. This is a discussion on RL-33 For use in. compared to Noslers 88 gr. 300 RUM|ive loaded with IMR 7828 and no luck. 338 Lapua Mag. The H1000 and Retumbo worked best for me pushing 300 SMKs. 6) and cutting edge bullets, gave me my best group (12/12 with 14 inch group at 1760 yards). Shooting sports information, projects and woodworking, fibreglass stock making, rifle rest plans,Mauser information, Snider reloading. RL-33 For use in. I decided to develop a load for my TRG with the Hornady 285 ELD-M and Retumbo , and settled on the longest feed-able length I could make work reliably - 3. All have shown good accuracy at varying velocities in my guns. 264 WM as well. Reloader 25, Retumbo, H870 (spherical) and H50BMG are suitable burn rates however H50BMG is somewhat course in kernel structure and most likely has abrasive qualities when squeezed through the small. 6 x 70 mm or 8. 75" groups at 100. 7 Comments. Mike Rate now: USMC1911XCorporal Rating: 3. I am looking for some load data for my Sendero 300 RUM. 287 Ballistic Coefficient. Dealer pricing available. A reloading manual will list what type of powder should be used in any given load. com • 800-531-2666 • Always consult a load manual and start with minimum loads. The go to powders for the Lapua has been pretty much been Retumbo and H1000.