Only state I knew of was Idaho with 65% max let off. I think even they may have changed this since.

I really don't know how a state would enforce a 65% vs. a 80%. Less they knew how every bow at 65 or 80 was labelled etc...and had game wardens in the field checking?

I don't even know of any bows making more than 80% let off, i know many states won't let you use something that creates 100% let off, like a cross bow etc...

Pretty sure you're good with 80 let off in NM, CO, WY.