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Grant Lovelock

Hey people, Grant here from TrueFlite

For Thomas's action we are fitting a 1.240 diameter Knox diameter barrel to it..... this allows for nearly 1.5mm shoulder to mate against the receiver face... given that we do all our barrels up to 70ft pounds of torque, I cant see that deforming the shoulder at all.
The thread is what stops the barrel from flying off the end, so from a safety point of view, that is covered.
The shoulder ultimately sets the head space so once that shoulder has been set and checked after fitting there should be no change at all.