I have to agree with everyone. Set up correctly, all of Martin's bow will hit IBO. The Ryteras just seem to be in the higher end of IBO. Got my 2011 AX at 72#, shooting a 434gr. arrow, 28.25 draw length, and getting 302. That's pretty impressive to me for that arrow weight. Haven't chrono'd my 65# yet, but it shoots just as flat, so it's gotta be real close.