IBO and AMO Rating
 

Can anyone tell me what the difference between the IBO and AMO ratings are?
Dusty9

RE: IBO and AMO Rating
 

I don't got it down but the way I see it
the AMO speed is what you would get if you were to choose your arrows from the easton arrow shaft selection chart.

If your a speed freak and shoot light, short arrows, maybe with an overdraw, then the IBO rating is more accurate.

I think there is an arrow weight (grains per ____?_____) that goes with each.

Nic

RE: IBO and AMO Rating
 

IBO rates a 70# bow at 30" draw with an arrow that is 5 grains per # bow weight equaling 350 grains, therefore high speeds. AMO rates a 60# bow at 30" draw with an arrow that is 9 grains per # bow weight equaling 540 grains, therefore the lower speeds. AMO now also has a test for the same 60# bow at 6 grains per # bow weight equaling 360 grains. AMO dos'nt approve of the IBO test, it puts the bow too close to the danger zone.

RE: IBO and AMO Rating
 

IBO is not a standard in my opinion. Mfgs. vary on their setups somewhat. When I judge a bow on its speed I find it to be more accurate by the AMO speed ratings......that is just my personal opinion and it works for me. Its much more accurate to what the average bowhunter sets their bow up to hunt with.