AJ52,

I have this belief that you need to stop the blowback at the face of the breech plug. If it screws up snugly against the rear of the barrel so that gas can not pass back through the threads, if you achieve this seal your blowback problems will be nonexistant. The big deal is to get this seal... When I was using the greases I would put a light coat (ring) around the face of the BP (and the threads) to help provide this seal - that really was kind of useless because the grease at that temperature will not provide a seal, but it certainly will go forward into the barrel.

The tape has provided the answer for me, with the overwrapping of the plug a seal is almost guaranteed and as the first shot drives excess tape back into any void where I might not get a seal.. I virtually do not want any blowback in the threads of the breech plug.

Just a theory but so far it is working...