As for the horsepower of the thing...Anecdotally, the fellah who built my .62cal rifle kills elk every year where he lives. His guns have taken most everything in Africa, with the ball pushed to about 1900fps. And most anything most of us would hunt could be poked at 100yds with one of his rifles, with no worries.

This pistol muzzle velocity is about identical to the velocity of one of his rifles at 100yds.