Duck - My question to you is - If you already loaded to Max as stated in you manual and shot at just over .5", why would you want to juice your load up more? Most shooters would drool over a .5" group (at 100 yds I assume). But my answer to you is - remembering a conversation with a bowhunter about arrow speed - It don't matter how fast your arrow is going if you miss. So IMO, I would tell you to drop back down to your previous load and be happy. What you're gaining in velocity isn't going to matter that much to a deer anyway.