I remember talk of shimming the firing pin. And to be honest, wondered why I did not have to do that. But to be honest this is the first time it ever fouled so bad on me. And it is a CVA breech plug. I tried to call them and listened to some personality talk to me for ten minutes and decided I had enough of him.
Perhaps I tightened the firing pin in to hard last time I cleaned it? But I thought that is what your supposed to do.