Well after a couple of weeks of driving myself crazy trying to tune in some 65-70 hickory arrows to my 60lb GN fireball I had almost lost my mind. I messed around with tip weights building out the shelf, adjusting brace height and nock height to no avail. My college kid income prevented me from buying more arrows so I was stuck with what I had. I switched to my dad's 57 @ 28 Holmes longbow I and wammo I hit the jackpot. They shoot great, even with 145 snuffers. Now I just need to talk the old man into parting with it until after bow season.