I'd never recommend more than about a 40-45 yard shot. But I can tell you its probably capable out to around 50 yards. I accidentally mis-judged a shot on a Tom 2 Spring's ago and took what ended up being a 62yd shot and he dropped on the spot with barely a few flaps of the wings. This was with a Winchester SX3, 26" barrel 3 1/2" Federal Strut Shock #4's and the factory full choke. I'd assume #5's might not have the knock down power out that far..but probably fairly close. But again, the disclaimer, don't shoot much past 40-45 yards.