« Reply #9 on: June 13, 2012, 06:24:24 AM »
YRU,
Maybe this helps a little but it is 45 cal smokeless MZ data. I have (2) Handi 45-70s that I converted to MZs, one has 22" barrel and the other has a 18.5" barrel, i cut it down, not a Talo Trapper. Accuracy is equivalent on the two guns, about 1.5 MOA, at least when I don't get in the way of the gun too much.
18.5" MZ - 279 grain Sabot, 52 grains I3031 = 1,623 FPS
22" MZ - 279 grain sabot, 52 grains I3031 = 1,796 FPS
I would think with the larger bore size MZ the velocity difference by trimming 3.5" off the barrel would be less than this.
BB
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