Since each rifle is slightly different, even if you had two or three of the same side-by-side, you would likely get slightly different results from each rifle.
I've got ten .22 rifles, each does well with certain brands, but dang near every one likes something different.
Use a LOG BOOK...log your groups, wind conditions, distance, ammo...clean between ammo types,
at least run a boresnake/patchworm down the barrel...in this way you won't color the results from box to box...
and I fire at least 50 shots when testing varieties of ammo...groups tend to tighten up as you foul...
but you want all the same fouling from THAT particular brand of ammo,
NOT a mix of fouling, as it will skew your results.
I'm not just Trigger Happy, I'm Trigger Ecstatic!!