thanks for he replies to date everyone. Looks like a new Barrel could be on the cards. A machined up LP10 Barrel would do the job (maybe) as it's ported for the gas transfer, but buying one of those wouldn't be cheap anyway. I've got an LP2 Barrel that I could use for starters but it's too short and whilst I could machine a sleeve for the end, I really want rifled barrel all of the way so that I can maintain the MV otherwise velocity or shot count would be compromised. Regarding the Transfer Port burrs caused by Machining through the Transfer port could possibly be eliminated by a Bore Skim as the first part of the P44 Barrel appears to be smooth and above nominal calibre size.

Vic Thompson.