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Old June 12, 2012, 09:12 PM   #1
mehavey
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Join Date: June 17, 2010
Location: Virginia
Posts: 2,867
Heavy 45-70 (RCBS 500gr/LFNGC) and AR-Comp Powder

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?
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