My dad recently bought a Mossberg 935 shotgun for duck hunting and he realized when he brought it home it would only take 3" and 3.5" shells. This was okay because he usually uses 3" shells when duck hunting. But then he realized he wouldn't be able to shot 2.75" for skeet and trap, which made him a little mad. What would happen if you put a 2.75" shell in the gun and shot? Thanks.