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New Alliant 2000 MR powder

Discussion in 'Handloading and Reloading' started by griff383, May 19, 2011.

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  1. griff383

    griff383 Member

    Jan 20, 2010
    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.
  2. ebroch

    ebroch Member

    Aug 19, 2011
    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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