I have a Bounty Hunter single action in .22 WMR with the interchangable cylinder for .22 LR. This pistol is big, heavy and durable, with over 1000 rounds of .22 Magnum and .22 LR out of her. I've not experienced a single problem with it, although the finish is wearing somewhat around the crown of the muzzle and the front of the cylinders. I attribute this primarily to holster wear, since this has been my backpacking gun for a while now.