My rifle seems to favor SK and Lapua ammo. [TRP-3] Most of the time it will keep SK+ in .2 and .3 @ 50 yards and .8 to .9 at 100 yards. I have some Midas+ that normally holds .6 at 100 yds. Most of the comparable Eley ammo won't shoot quite as well. The results with my Bergara b14 seem to be pretty much the same except my groups are slightly bigger. I am wondering if the headspace has any bearing on which ammo it prefers.[Eley target and black box used as a comparable ammo]