Try dry fireing a few times, as you may have dirt trapped . BBF Thanks I did dry fire it prier to balloon test I also dry fired it up side down hoping some crud would come out but in the morning there was air in balloon Still don't understand how dirt or crud would stop nay keep firing plunger open...

Hi did the balloon test on my s400 on filler and barrel the filler one's ok, but the barrel one failed I asked at my club and a technique guy said it would be due to firing pot plunger he at to leave at this point so could not grill him I've looked on chambers and can not see any sort of "O&quo...