Originally Posted by
sunjbr
Based on your numbers they would be the same fps sitting at 450 fps
Btw, i see where the 450fps came from now.
First of all, IBO speeds are set at 70#, 30" draw length, with a 350gr arrow.
If bow A is rated at 330fps, and the archer is shooting a 350gr arrow at 70#, but only with a 27" draw length their calculated speed will drop down to 300fps roughly.
Sorry I forgot to explain where speeds are obtained from.
You can take this info now and apply it to any bow.
There is quite a but more depth in the subject, but this is a good foundation.