in response to 9.3 - it is a consideration, but the shooter is 5'7 and about 135lbs or so. :P However, I used to fire my M39 Mosin one-handed with 2moa accuracy at 25yards.
I shot a 1903 20" recently (sporterized, had recoil pad from 1974 mostly-dried-out :P), .30-06, 180gr ammo (Remmy). Was fine shooting, but upon firing I couldn't be sure of where the round was going, and the kick was right on my upper limit (no more than maybe 5-10 rounds and I'd be finished).
Another question - when I was handling CZ Fullstocks (452 and 527), and doing a "Recoil-test" ("pulling" the rifle hard into my shoulder w/front hand, following barrel in line of force), it seemed to direct all the recoil straight BACK, with limited muzzle lift...
Also, my old M39 would go BACK hard, but not a lot of up. The swede tends to want to lift more...
In practice, do hogbacks actually reduce or increase muzzle-jump?
