I picked the 7595 XT's for my setup, an 04' Patriot S/C at 72lbs and 29" draw. I haven't gotten to actually shoot it yet since it all just got here in the last week, but I have heard many places that the 55/75's recommended on the chart are often under spined on a lot of the faster bows. I would rather be slightly overspined than underspined when the broadheads go on this fall.