and installed it last week. I took it out to the farm to shoot. Ran 3 rounds thru it before it went bang. I have lots of pictures so I will post those next. The first round fired but did not sound right. Naturally I did not let that stop me. The second round fired and still did not sound right. Lot's of smoke. I said, ok one more just to see. (This was stupid. I should have stopped). The third round blew the magazine out of the magwell, cracked the bolt, blew the hole bottom off the round and stuck the remainder in the throat of the barrel. The receiver seemed fine after inspection as did the barrel. I found the fired casing from the second shot. It shows pressure signs with the primer bulged out. I was shooting Remington 180 grain FMJ. I had shot some of the same box last week in my Sig239 and they shot fine. I will contact JRC today. But, I am not blaming them. I just want to know how I screwed up the conversion. I never want to do that again.