It really depends on what your goals are. If the only reason you shoot 3D is to get ready for hunting....I think you have your answer. I shoot 3D because I want to win, so I shoot a very light arrow out of a 40# bow: about 6.5 gpp. When I hunt, I shoot a heavier arrow out of a 55# bow: about 9 gpp. Before I hunt, I spend a week or so shooting nothing but my hunting bow, and does it ever feel heavy at first! But by the time I hunt, it feels normal. And does my target bow ever feel light when I go back to it! I think it improves my target shooting to switch over to the hunting bow for a while, but probably doesn't work in the other direction.