ORIGINAL: sinke123
Anybody know how many fps I would increase if I jumped from 66 to 70#? I am shooting a black ice with a 29 inch draw. I am going to go to a tubeless peep which will help a little. Just curious.
I got a birth certificate w/ my B.I. ,you should have also.
Mine read 29/70/299fps. w/ a 350gr arrow.
So justsubtract 1 fps for every 5 grains over 350grs. your arrows are.