slug info on the Evol 30

I have only shot them out to 75 yards so far, but FX hybrids are shooting like the Evol was made for them.

They shoot as well as 44.75 JSBs at the factory settings, and I have noticed no erratic flight characteristics or stray shots that could not be directly attributed to my lack of technique on the bench.
 
I tried the NSA 47.5gr in an earlier EVOL. At 50Y the first 3 of them were touching so I was very excited then the 4th landed over an inch away and the 5th somewhere in between. I shot another 4 groups and the average was 1.3" or so. Not horrible and not great so I disqualified them.

Although I didn't test it my suspicion was for that barrel the lighter or hybrid designed slugs would be more appropriate????