It shouldn't, as long as you don't use steel shot. But the gun will pattern better with the chokes. Iv'e seen some pretty erratic patterning without chokes installed. I think the exposed threads tear up some of the pellets, leading to lots of flyers. Anyway, I was looking at one of those Stoeger Coach guns at Gander Mtn. yesterday.........awesome. I love them, and probably should buy one soon.