RTI Priest / Priest 2 Owners - .22 pellet of choice?

I've just purchased a couple of barrel kits from AOA for my Prophet Performance model which is 'natively' a .25. NSA 36.2 slugs and JSB King Heavy MKII's are lethally accurate out of that barrel.

The barrel kits that AOA sells are Priest 2's. I've got the Priest 2 .22 barrel now shooting .216 JSB KO slugs pretty well but slugs being what they are - they want speed, which translates to higher reg setting / higher hammer spring, etc .... now I'd like to get a tune for a pellet that might be a little less "demanding" - ie; fuel efficiency - aka better shot count. ;-) The JSB 18.1's are practically a 'gold standard' as a reference mark for .22 pellets but . . . I'm thinking something a little heavier. 

  • The JSB 25.39 RD's?
  • H&N 21.14's?
  • Other . . . ?

Curious and thanks

-=- jd -=-
 
Hello I have a RTI priest 2 standard I have done nothing to it mechanically but add air and pellets. I cronographed it with JSB hades 15.89 at 975 fps(factory setting) with a standard deviation of 4 fps, at 45 yards it shoots 1/2 inch or better. I have tried other JSB pellets (sampler pack) but these work very well and that all I shoot out of the gun . Just my experience with the gun Eric