W.T.H.,
WAS THIS WHITETAIL FACING YOU AND YOU SHOT HIM IN THE BRISKET? I'VE HAD MY SON HUNTING WITH A 243 FOR YEARS. EVERY DEER THAT HE'S SHOT WENT DOWN LIKE A STONE. 85 GR SHOULD BE ENOUGH, ALTHOUGH I'D USE 100'S GIVEN A CHOICE. SOMETIMES A BRISKET SHOT WITH A HIGH VELOCITY CARTRIDGE WILL GO RIGHT THROUGH AND MISS VITALS IF THE SHOT IS CLOSE RANGE(WITHIN 100YDS)