the only 308 magnum I can think of is norma, everyone else seems to prefer 300 mag designations...
you definitely need to have the chamber cast, for all you know it's some wild cat that necks a 50 BMG down to 30 cal...
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin