greg, i've got a acc 3-60 at 29" shooting 286.71fps out of a 28.5" 65# guardian w/ 4" gateway feathers and a 100 gr tip. foc is 10.1%.
spine is optimum!

a 125gr tip will give you 279.55fps and a 12.5% foc and a spine dead on optimum.


cut it at 28" and you'll be shooting a 125 gr tip at 282.06 w/ a slightly stiff spine (great) and a foc of 12.8% - still maybe a little low for hunting, but probably just fine - depening what you prefer.

this was w/ archer's advantage (hopefully i put the info in correctly)