Sorry, I think I've had enough.
I'm just going to chamber a No.4 to 300/303 Win Mag and see how long it lasts. Just trying to find a Bubba'd .303 barrel so no good barrels have to suffer! (might just round up a .30 cal barrel and thread to fit if nothing turns up in a week or two- plenty of those littering the area!)
I mean, I went and paid for eight years of learnin' and never gots no "Physics" book w/ a big boat on the front! Daaaang.