Iv got one and I've used the AA field and jbs but the daystate sovereign 15.90gr 5.52 head size was and still are the best for all 3 of my daystate rifles
I tested all 3 pellet types in all 3 rifles every 5 yards from 5 yards out to 70yards and the sovereign was the best even at 70yards the group only spread out to just under 1" ?