Anyone else own a 512 or 513? Took my 512 to the range this morning, and it would not go bang. Last time I used it it was perfect as usual. Everything appears to be in order. My first thought is that when I cleaned it last time I re-assembled the bolt wrong. But it fits, cycles and clicks whne the trigger is pulled so not really sure. Maybe a bad firing pin? It might be a few days before I get a chance to tear it down so hoping someone here has some insights or hints. My gunsmithing skills are not strong. The good news is my 452 still shoots well.