If your not shooting it on a regular basis then it won't be a problem, However it will wear the rifling down over time with continued use. My Dad had a .22 he use to shoot rat shot out of to keep the mice and rats down in his chicken house, Needless to say the barrel was almost smooth.Hamman said:What are the cons if any to shooting shot, buck or pellet out of a fully rifled slug barrel for the purpose of HD.