I'm shooting a 419gr arrow at 66lbs at 272fps. I like to shoot heavier arrows than needed, a guy could really get some speed from that bow if you shot a lighther arrow. I am shooting Easton Axis 340s and they penetrate like crazy. I have completely punched thru a Glendel Buck 3d target (it was brand new) and those all foam cheaper 3d targets that Cabelas sells I get 6" of penetration thru the whole target at 30 yards. When i punched thru the Glendel buck I had a Muzzy 4 blade on, and the distance was 47 yards.