Had my blued Peacemaker replaced due to inconsistent power output where the bb's would either not reach target or just fall out the barrel!!! My antique gun has had the odd weak shot but generally performs well. The replacement guns shells have an o'ring under the plastic bb insert to cushion compression and put more pressure on breach seal i'm guessing. The old shells in the antique dont have the o'ring so i'm wondering if they had a few guns back with weak shots and think the o'ring will be a solution. See how we go. I've already had six or so weak shots with the new Peacemaker. Anyone else had this problem? ATB. Pete.