Onza 3 speed???

[elkslayer4x5]

IBO and ATA are not the same anymore. IBO can be up to 82# as long as the arrow stays 5 grains per pound, and if I'm not mistaken the draw can go up to 31". If the Onza meets IBO, then why is my Maxxis so much faster when it is rated only 321fps ATA? Is Martin IBO ratings or ATA? (ATA is still 70#, 30" draw with a 350gr arrow)

ATA = Axel to Axel

[deserthuntr]

ATA = Axel to Axel

ATA = Archery Trade Association

I've found this on another forum:

"ATA (Archery Trade Assoc.)- Is strict. Exactly 70lbs. an exact 30 inch draw and exact 350 grain arrow. ATA is also shot with fletching or vanes on the arrow and with a D-loop on the string.

IBO- 30in +/- .75(usually +) and shot anywhere from 70-82 lbs with a an arrow that is 5 grains per pound. IBO shoots off the string without a d-loop which is a touch faster and they shoot without fletching or vanes on the arrow which cuts down on drag on the arrow so it is faster."

[deserthuntr]

Also got this on another website:

"For those with questions regarding ATA/IBO velocity: ATA speeds are 70 lbs, 30 in. draw at 5 grains per lb. IBO speed is commonly believed to also be tested at 70/30. However, in actuality, the IBO standards allow for speeds to be tested at poundages as high as 82 lbs as long as the arrow is at 5 grains per lb."