New Alliant 2000 MR powder


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griff383
May 19, 2011, 09:03 PM
After talking with one of the guys at Cabelas I decided to try some 2000MR to see if I could eliminate a few powders in my collection. Varget is pretty much my goto in 308 and I have had really good results with IMR 4064 in my 243.

Ive got a few days to gather some data and get some loads built up to try. I have a handfull of rifle powders and if anyone would like me to check a pet load of yours vs the 2000 I might be able to help. I have 2 308's available for testing, a 16" AR-10 and a 28" Pro-hunter. Bullets are a little limited, I only have 168 and 175 BTHP. With 243 I have a 26" barrel and 85 SMK and 100 BTSP bullets.

Im really excited to get out and test the claimed velocities to see if its worth all the hype. I will be chronographing these loads so comparison will only be by velocity not accuracy as results will vary from rifle to rifle and so on and so forth.

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ebroch
August 19, 2011, 09:54 PM
I recently tested Alliant 2000MR powder in a stock, no pun intended, Remington SPS Tactical (20" Barrel, 1-12" Twist) as I was looking for increased velocities. I'm pleased with its performance as compared to Sierra's max loads with Varget (43.5 gn) and/or Alliant RL15 (43.6 gn) both VERY accurate powders in this rifle, however slow they are (~2480 f/s).

Below are the cartridge specs and components (the same as used with the other powders) :

Brass: FC 308 WIN
Primer: CCI BR2
Bullet: 168 SMK
O.A.L.: 2.930
Sizing: Full Length

Test loads (w/2000MR) and results:

47.5 gn, ~2609 f/s 0.378", grp @100yds
48.0 gn, ~2660 f/s 0.487", grp @100yds
48.5 gn, ~2680 f/s 0.398", grp @100yds

The max load with 2000MR is between 150-200 f/s faster than the max load with either Varget or RL15 without any seeming loss in accuracy or pressure signs. I have, however, shot fewer rounds with the 2000MR than with the others. That said, 2000MR will be my go to powder now for this rifle.

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