He is talking about grains per pound, and @ 6 grains per pound the arrow will weigh differently at 60#'s and 50 #'s......

6x60 = 360
6x50 = 300

To shoot a 360 grain arrow out of both a 60 and 50 pound bow wouldn't be comparing the same thing. The 60# bow is gonna shoot that arrow about......25 fps or so faster than the 50, so it wouldn't be an even playing field.

Again, a heavier arrow will retain it's speed and momentum longer than a light arrow. At least, I THINK that's what TFOX is getting at...eh buddy?

We were posting at the same time.

Thanks. Around 30 fps loss from zero to 40 yards isn't much. Most centerfire rifle bullets would lose twice as much in that distance.