That' s a fair assumption

And I was wrong on the AMO, I think it is using a 540 grain arrow at 60#s with a 29" draw, not the 6 grains per pound I posted above... I think I' ve killed too many brain cells...

If you post what the AMO and IBO ratings are for your bow, what the bow is, what cam option, how you have it set up, what' s on the string, the make, model and length of your arrow, total arrow weight, guys here are very good at getting you a pretty close estimation of what you may be doing...