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Heavy 45-70 (RCBS 500gr/LFNGC) and AR-Comp Powder

Discussion in 'Handloading and Reloading' started by MEHavey, Jun 12, 2012.

  1. MEHavey

    MEHavey Senior Member

    Jul 27, 2010
    I picked up a Remlin GBL today, and afterwards began rummaging around in my old
    moulds drawer from my Sharps 45x3-1/4 days to find my what I had from 30 years ago.

    Out popped my RCBS 45-500 FNGC.

    Next I went to my 48th & 49 Lyman (& Cast) handbooks to find nothing that heavy
    other than in the Ruger#1 section; ...and then finally to a really old spiral-bound Ideal
    manual (60's I remember) to finally find loadouts for the Lyman 500gr 457406 mould.

    Then I went to QuickLoad and ran a propellant table analysis looking for options other
    than "the usual suspects" of 3031, 4198, 4227, RL-7, etc.

    Out popped brand new AR COMP of all things. It came out waaaay far and ahead of
    anything else for that bullet at pressures under 30,000psi. I mean THE top: Full case,
    and full (97%)burn with the top velocity predicted of 1,470fps from an 18.5" barrel.

    Before I start playing around in earnest, has anyone here had any real field experience
    w/ AR COMP in the 45-70?
  2. jack44

    jack44 Active Member

    Sep 12, 2011
    North Woods - Wisconsin
    I have a 1895GBL and I use as my main powder IMR3031 never use jacked bullets just cast lead. Some people use AA ever tryed Alliant 2400

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