What is heavy or causes pain in one person may not be heavy, nor have a negative effect on another person. Just like going to the gym, there might be someone at the gym that warms up with your bench max, or vice versa.

Prime example: I was setting up a new 60# G5 Quest Rogue for a guy this fall, he tried my bow while I was working, a 73lb Bowtech Destroyer 350. He couldn't draw it. Actually could not draw the bow. He's an early 30's guy, been bowhunting for almost 20yrs, shoots really well - but couldn't get it drawn. Obviously not the bow for him. I'll shoot 50-100pins on a saturday morning with that bow and not feel sore the next day.

We just put 60# limbs in my wife's Mathews Jewel. It maxes out at 64lbs now (not balanced tiller). My wife is 5'3" and 130lbs. She pokes fun at my best friend because his bow is set at 63lbs, a pound lighter than hers. :P

It's all relative. Different strokes for different folks.

At the end of the day, a guy should shoot whatever he can meet all of the following criteria with:

1) draw comfortably, smoothly, and quietly
2) let down comfortably, smoothly, and quietly (and safely, of course)
3) hold draw long enough under hunting conditions to make the shot
4) shoot 50+ pins in a night and not cry the next day from being sore

If that number is 100# for you, or 40#, it all depends on the shooter.

One distinct benefit of a higher powered bow is that you can use more "traumatizing" heads to cause more damage, but still get a pass through. Sure, a 35# bow can deliver a pass through with a fixed blade cut on contact head at 15yrds, but a 70lb bow can pass through at 60yrds with a punch cut head with almost twice the cutting diameter. Leaves a bigger blood trail.

So to each their own.