Call me Capt. Obvious, but I can advise 3"ers are no fun to shoot in a 12 gauge Citori Featherweight. That being said if 3" were the only PS available, I would buy some and limit their use to my SX4, BPS, and various 870's. For waterfowl, 99% of the time I shoot 3", and that last 1% is 3.5"...