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AA2520, what caliber do you use it in?

Discussion in 'Handloading and Reloading' started by NuJudge, Nov 7, 2009.

  1. NuJudge

    NuJudge Active Member

    May 20, 2006
    SE Michigan
    There are lots of worrisome comments about peening in M1A and M1 rifles when loading 2520. Does anyone have any good loads they use in manually operated rifles? I have a bunch of it and would like to use it.


    MMCSRET Senior Member

    Feb 18, 2008
    North Central Montana, across the Wide Missouri
    I have several acquaintances that use it in M1A/M14 service rifle competition loads and have for years. It is roughly the same spectrum as the 4895 and other powders in the "middle". I've used it very successfully in 25-35 with the Hornady 117 gr. RN bullet. I've used it in 243 and 308 and 30-30 and a bunch of other medium capacity cases. Never had a problem with it.
    I never tried to "hot rod" it, just factory duplication loads.
  3. NCsmitty

    NCsmitty Mentor

    Jun 29, 2008
    North Carolina
    Here's from Accurate powders about AA2520. It's real close to IMR4064 burn rate, but it's a ball powder.

    My load data pay site had this comment:
    IMI cases and CCI 200 primers were used in development.

    PMC 150FMJ and 46.2gr load will approximate M2 Ball ammo.

    I believe the velocity is around 2650fps.

    FYI, Maximum load listed at 51.2gr @ 2870 FPS and 58200 psi, for use in commercial '06 rifles.

    Last edited: Nov 7, 2009
  4. Redneck with a 40

    Redneck with a 40 Senior Member

    Jul 26, 2006
    I load 2520 for my dad's FNAR in .308. 44 grains, magnum primer, 168 gr HPBT's are printing 1.5" at 100 yards, which he's more than happy with.
  5. Slamfire

    Slamfire Mentor

    Dec 29, 2006
    Peening was a curious phenomena that the military had in M1's and ball powder. I forget the causes or the cures, but I think peening is a mute subject today.

    Back in the 80's AA2520 was the hot new M1a powder. Jugs and kegs and tons of it were shot through M1a's without any problems.

    Not only did it shoot well, but it meters fantastically. Not that it makes any difference on paper.

    Yesterday I shot a HM score with 69's in the .223.

    I bought a lot of the stuff when it was $64.00 a keg. But all things being equal, I prefer IMR 4895. Some lots of AA2520 were real dirty stuff, almost like charcoal dust, and I hate having to use a copper bristle brush cleaning deposits off my AR bolt. Which is what I did yesterday.

    I have shot AA2520 in the M1, shoots very well.

    I shot this prone rapid fire group with AA2520 and a M1a at our Club's 100 yard reduced Highpower match.

    Stuff shoots well.

    Any caliber combination that shoots well with IMR 4895 will also shoot well with AA2520.


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