Anything else I am missing?
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Case head diameter!!!!!!!!!!!!!!!!!!!!!!!!!
Over all length
What he said.
If possible i would look at 338 Rem Ultra mag or 338 Norma Mag. 338 Norma mag would probably be my choice if it works in your action as its now a standard cataloged round by our armed forces replacing the Barrett 82 50 cal. It has a future but youll nee to see of you have enough magazine and bolt length