Oops, guess I should have explained that a little better.
Starting with an IBO of 290+ will have you actually hunting anywhere from 235fps up to ~280 which are both perfectly fine for hunting.
But like pseLee stated the draw length, draw weight, arrow weight and do-dads on the string are gonna lower the IBO # in no-time flat.
In the good ole days of AMO ratings I would take both the AMO and IBO numbers and know I was gonna land somewhere in the middle.