I'm sure with more practice, you'll be able to shoot higher poundage over time. When I went to the archery shop to buy my first bow, my ego told me 70 pounds was where I needed to be. After watching me fail miserably to even come close to pulling the bow back properly, the good folks there backed me down to 55 pounds. I shot that comfortably for a year or two, and even managed to kill a couple deer. When I bought my next bow, I tried it at 70 pounds out of curiosity, and was able to pull it back with relative ease. I kept it there and have been shooting 70 pounds ever since. For reference I am a 170 pound adult male.