I have several mags for my 22TCM pistol and they all let the slide lock open before the last round gets chambered, leaving that last round still under the feed lips or slightly forward. This happens more with the 9x19 barrel installed, which gets more range time than the TCM barrel. I have installed an extended Wilson slide stop, hoping the slight extra weight would cure the problem, but no joy. Something is causing that slide stop to jump or bounce up enough to lock the slide back prematurely. Does anyone have any experience with fixing a problem like this? Thanks in advance....DanM