I don't know about this problem but I have seen one pierced primer cause serious problems. I saw a piece of brass get shoved up inside a firing pin channel destroying the firing pin and spring. If that piece had just stuck inside there it could have caused problems like the ones described with the trigger on the 22 Victory. I'm not at all familiar with the layout of that pistol but the problem I saw with the firing pin was on a semi-auto but it was a rifle. I would think that a piece of brass in the wrong place could definitely cause the type of problem described with the Victory.