the airgun i used was from
http://www.quackenbushairguns.com/ it shoots a 275 GRAIN ROUND NOSE at 575fps. here is something about this gun from there site
The Bandit is a .50 cal. (.495) pre-charge 3000 p.s.i. rifle. The ball weighs 180 grains, goes 790 f.p.s. and produces 250 ft.-lbs. This rifle was intended for use hunting white tail deer and boar. Projectiles, such as the 180 gr. lead ball, have sufficient mass for hunting deer and boar. Rather than making the projectile heavier just for energy's sake, it is better to raise the velocity for a flatter trajectory. Game do not always appear at even increments of distance, or at your exact sight-in range, so the flatter trajectory is an advantage. If you're shooting from a bench at a known and fixed distance, flat trajectory isn't important. At varying hunting ranges it is very important. All rifles are hot salt bath blued steel with a hand rubbed oil finished American walnut stock.
think as big bore airguns as a shotgun, the have the same range and will kill deer or boar at 50-100 yards.