Petes Savage plug vs OEM

[GMB54-120]

Is there any major differences in the two as far as threading into the barrel? I realize the head spacing might be different and i will need to adjust that but im getting a MLII/45cal Pacnor setup for Pete's plug and the seller is keeping the plug. I have an extra newer style OEM plug i can use or should i get one of Pete's?

My plan was to use the OEM plug and mod the primer pocket a tiny bit for the best fit with CCI209Ms. Then head space it for that plug. Is this a good idea or should i just head space the newer style OEM plug?

Thanks

[Deleted]

they are very close spec with each other