According to the FOC calculator, I'm around the 10.5 mark with the 5575's.

The arrows would fly great for targets, but I had problems getting BH"s to tune. I could only get the BH's to come within 2" to the right of the FP's at 20 yards. After reading many of the other posts on this board, I am convinced that I should be able to get both of them to be hitting in EXACTLY the same spot.

I haven't tried to tune the 7595's yet, but it did seem that I was just slightly underspined.

I wonder if this has to do with the bow/cam?

My friend is shooting a longer GT 5575 at 74# from his Mighty Mite, and we could get them to tune perfectly. They were hitting exactly the same out to 60 yds.