If bullets don't keyhole out of the gun your max effective range is about 5ft. I've killed a lot of shit with the above revolver(with shot). I can group a cylinder into a baseball @25 with a variety of solid ammo.I set my wife up with a 22 and birdshot, I tried it out on a chipmunk at 15 feet and it ran away but it did make a snake bleed about the same distance, slowed it down enough for a second shot. This was through a worn out rifled BBL, I doubt that a smoothbore would be much better . I'd recommend something with a little more power.