Originally Posted by ckeifer
How much should I buy into the IBO on these bows?

My 2012 Bear Encounter is rated 310 fps “IBO”.
That’s based on 70lbs. pull, 350 grain arrow, 30 inch draw, point blank Chrony.
“AMO” rating would likely be about 240-242 fps. That’s based on 60lbs. pull, 455 grain arrow, 30 inch draw, point blank Chrony.
I’m shooting 66lbs. pull, 565-570 grain arrow (33”), 32 inch draw (+.75” Dloop and Peep on the string), point blank Chrony – 237-238 fps
At 12 yds down range still @ 233-234 fps, 68.73 ft Lbs of Kinetic energy at that point. That’s plenty for the largest NA game. If I ever hunt Kodiac, I’ll Crank it up a few pounds. I’m happy with that.
I'm pretty sure that if I cranked it up to 70, set the draw at 30" and shot a 350 grain arrow out of it, She'd Chrony right about 310. I couldn't hunt with it though.