Out west, long range is a given, but 800 yards is just a bit too much! I shoot a .308, a 7 Rem Mag, and a 300 Win Mag; come from a family of long range target shooters, and under no circumstances would any of us try that shot. As DRS said, the .308 will reach that far, and make the kill ifeverything is perfect, but one wind gust, and the bullet may move ten feet = miss, and it may move two = cripple.
I pass the shot personally. 500 yards is getting close though