At 200 yards, I'll go with the 12.7X108; it has sure fire knock-down power. Elmer Keith (IIRC) poo-pawed the 50BMG at 200 yards as not being enough, and, that's good enough for me!
Its all right to be white!! Stupidity left unattended will run rampant Don't argue with stupid people, They will drag you down to their level and then win by experience