I have a 1927 M54 in .270. All original including factory Lyman peep. Has anyone ever heard of any accidents where the firing pin was blown back when a case ruptured? I read that the original M54 that did not have the gas release port in the receiver ring could have this happen? I have not seen any evidence of this online and with quite a few still out there being used if it was a big problem someone would have mentioned it? I do know that Winchester would drill the gas port and change the firing pin to the one piece FP if the rifle was sent back to them. My M54 was built before the factory gas port, but it does have one now. The rifle was sent back to Winchester at some point for the modification.
