This is a slippery slope....
Clean burning does not equate to consistent groupings. I have ran the gambit : from Real GOEX BP right thru to Blackhorn 209 ( with numerous long since discontinued lines in between such as CLEARSHOT, AMERICAN PIONEER POWDER, JIM SHOCKEY endorsed $hit, IMR whitehots, Black Mag....all garbage groups although the bore was minty fresh.
I always return to FFG T7 for my inline, and GOEX for side lock.