potential, really, given a good choice of slugs in the 12 ga, and decent sights on it. Reaches 100m with irons, 125m with a scope. 45-70 doesn't reliably reach enough further to MATTER any, and the pump is faster for repeat hits. Also, the shotgun offers buckshot and birdshot options, the 45-70 offers nothing. It aint hard to find a used Mossberg pump, with iron sights, for $150,private sale. Or a $100., and get the sights mounted for $50, if u just know where to look. 440 grs, 1400 or so fps, or 250-400 grs,at 1800-1500 fps. whoopee doop. Still drop like a stone because of gravity, blunt nose, and still drift inthe wind like a balloon, because of low velocity and wide profile to the wind.