I will probably use the 6.8 here for shots under 400 yards. I can ring the 500 yard gong with it but it loses alot past 400 yards. Truth be told I really like 223/556 for medium game but its not legal here.
Nosler makes a 110gr AccuBond that I will try to work with this summer to be ready for next fall's antelope and mule deer hunting.....I would feel comfortable with it on elk also at closer ranges.
I do have a 25-06, a 243 Super Rock Chucker, and a 300 WSM
also to use for hunting big game.