Action length shouldn't really be a concern, unless you are a short bastid like stick. Then a 1/2" might make all the difference in the world. I like Brad's answer, even though we all know he's a 308 guy, as is mathman. We also know both cartridges work well on big game. Some of us started out on one or the other, so we may have personal bias influencing our opinions and choices. I say, use what works for you and quit squabbling over which one "you" think is best....
