It hits your hand, cause thats one of the issues with this bows grip. Your hand is forced up into the throat and nothing stops your knuckle from getting up along the shelf. The cure is to shoot a higher then normal knock point. The buff is built with a very narrow shelf, there is no building out the strike plate unless you cant the bow a lot. I shoot the beeman mfx classics, which is a skinny carbon. I use 400spine full length with 100gr insert and 200gr tips. Can I shoot 500spine shafts with same tips, sure, but they dont fly well until the feathers do thier part. Only the 400spine would bare shaft for me. I shoot 3 under and even tiller. I mentioned the skinny carbons, cause I also can shoot full length 2314 aluminum shafts with 145gr tips very nicely. Obviously the larger the diameter, the further it moves the center of the arrow outward. In my opinion that bow needs a wider shelf.