You hunt with 315 grain arrow????????/ WoW I shoot 311 grain for 3-D and wouldnt think abouut using that for hunting And I thought I was to light at 425 grain for hunting BTW at 61# at 425 I am getting 270 fps....But if it works for you then what can I say???/ I checked and only came up with 69 ke for you. Where did I goof????? My badd ...did it again and got 82 ..sorry