I like the 30-06 or 8mm remington magnum, I have taken elk with both, the 8mm is definitely a harder hitting round.I like the distance of the 8mm better.Its to bad that remington does not offer it in there lineup anymore.My hunting buddy uses a remington 300 ultra mag , both the 300 and 8mm seem to do a good job but the 300 is going to be better for long distance shooting,350 yards and out.The bottom line is shot placement if you dont hit them in a good spot it not going to matter what gun your shooting.