A whitetail deer is a thin skinned animal. It doesn't take lots of poundage to kill a whitetail deer. I've been bowhunting close to 46 years and I take whitetail deer with both of my bows and my bows are 42# and 37#. The key (for me) using light poundage bows has always been a very sharp 2 blade broadhead, shot placement and heavy arrows. My 42# bow shoots a 672 grain arrow and my 37# bow shoots a 570 grain arrow. I don't think anyone shoots 15 grains per pound like I do. These heavy arrows give me pass through shots on the game animals I bowhunt. I practice shooting at 10, 15 and 20 yards, but when I'm bowhunting, I will take the shot somewhere between 12-17 yards.