Ben, I wouldn't want folks to think I'm single minded. I'll admit that your 70# self-bow is a wonderful weapon. If you drop your arrow, you an club the elk to death! 8^)
Seriously, there are a lot of guys who can shoot heavy bows on a hunt. And there are some guys who shoot them all the time. I know the arguments, but the body is finite, and that "all the time" argument really makes me wince. It's like the old ad, "Pay me now, or pay me later." I see threads all the time from older guys who have blown out their shoulders or have other problems, or who are selling their bows because they can't shoot any more. I have the same problems, though mine aren't from shooting heavy bows, since I really only started 5 years ago. I've gotten really interested in what you can do with light bows... 3Ding with 35#, hunting with 45 or 50. However, all that said (or preached), go get that elk! Any way you can :^)