Todays higher performance bows allow an archer to shoot less weight, with more speed with the same arrow weight than ever before...If a 55 pound draw selfbow can shoot a 500 grain arrow moving at 150-160 f.p.s. through a whitetail, than a 45 pound "Modern" design bow shooting that same arrow at 170-180 f.p.s should be better..I know a fella that shoots Osage/Sinew bows, keeps His shots under 20 yards, and kills deer dead consistantly.. His bows pull about 45#, and His draw length is about 26"..His arrows are heavy, over 500 grains, and He told Me that they chrono in the mid 140 f.p.s. range...He does well with His gear..Get Yerself a good 45# bow, and good arrows, and have fun...Harperman