Yes, by shooting a heavier draw weight you can shoot a heavier arrow and have more energy and momentum.

I tell ya though Zak, the older I get the more appealing a 60# draw weight bow sure makes me less sore and my joints hurt a lot less. I guess that's what shooting 3D @ 80# for a couple of years will do to ya. I'm probably looking at getting a Black Knight next year, but with a 60# draw instead of 70#.