Somebody will always open that can of worms, but I say go for it! As people have indicated build up to it carefully and stay in condition so that you can handle it well. When you get tired, put it down, but as you well know, over time you will become comfortable pulling that weight. Just be cautious that form does not suffer. Yes, I did hurt my shoulder with my heavy bow, but that was on me for using poor form. When I heal up sufficiently, I will again pull out the big boy. The first time I ever shot a 3D round that I thought was as good as I can do was with a 78# Bamboo Longhunter , so you will certainly be able to shoot a full 3D round.