If you use fbs on the longer irons, try adding 5 yards to distance calc. Only full back spin, not any other % of spin.
That number works most courses, except Wolf Creek. I find there mostly adding 7-9 yards depending on hole into a wind.
You need to play around with distance with that ball a club combo when using fbs. The shorter irons in that set tend to play closer to correct when using fbs.
You won't stop the longer irons, you have to play rollout also, and that will change depending on landing.
EDIT... nevermind most of the above, that applies to the RS2 irons, I thought you had those. Never played the first RS irons with that ball combo, or the nike the TP replaced. This is from menory, try using the level 34 cally and they play pretty close to calculated distance.