I shoot 72lb on my Hoyt. There is no doubt that I could pull 90lb, but I want to make sure I am making as little of movement as possible when pulling back my bow. I practice out of a chair pulling straight back, I don’t want to have to struggle to do so. If you are have to point your bow to the sky to pull it back, you need to drop poundage. There are other ways to increase speed and energy than just poundage. Tune your arrows.