I've noticed on my Hoyt that if I "overdraw" my arrows impact about 4 inches lower at 25 yards. I'm talking about pulling slightly past the back wall where the limbs flex a little more than usual. I normally don't do this I just wanted to see what would happen. Any idea why?

Because your cam and a half system is not synchronized. Do a search on creep tuning. Also, from my experience on Hoyt's it is extremely critical to make sure you have tiller settings correct.

I have a cam and half and cranking on the wall increases speed. If it's diving it sounds like your torquing and causing something to be off. Maybe some contact issue, or your spine is on the cusp. Could be what Rick said, can't see it though.

I think now it's your drop away not falling fast enough. You cranked up the speed, it's hitting the fletching and driving the head down.

Thanks. I currently have my limb bolts crank'd down all the way to the bottom with a 30" draw. Is it possible for tiller to be wrong with the limbs cranked all the way down?

I put on a new string in February and it has been shot in. My drop away is set up to as early as possible and my rest cable and knocks are adjusted to eliminate fletching contact. I'll have tolearn about "creep tuning".