i am no expert,but i think as long as you can group your arrows in a 3" circle at 20-25yds. without having to radically adjust at 10yds. you will kill deer.i started bowhunting with a 50# ben pearson from wal-mart many years ago using 2217 eastons 31" long with 125gr. kolpin twisters.i killed a buck and two does my first year with this set up.hunters get hung up about speed of the arrow without taking into consideration that unless you can find a bow that shoots over 1000fps what does it matter except for controlling the sound of your shot?i do not have expensive equipment but have learned about bowhunting from bowhunters and websites like this along with experience being the best teacher.just my views.i am 61 years old and and use a york bow set at the max of 70# with 30" eastons and the same 125gr kolpin broadheads and a predator pendalum with kisser button instead of peep.