Custom aquatics;
After you have purchased your assortment of ammo, I suggest that when you prove out which one YOUR rifle likes best.
1, Carefully clean your rifle. This means solvent & a brush (once or twice only) followed by a couple of clean patches.
Also carefully brush with rotary motion & solvent, the area immediately in front of your rifles chamber. This will remove a ring of carbon that builds up there that is usually not removed with normal cleaning.
2, At the range, fire at least 10 rds of each type of ammo to foul the barrel before shooting for groups. I suggest then firing at least 10 rds for group, more if you get really nice groups to check for flyers.
3, After each type of ammo, run a solvent patch followed by a couple of clean patches through the bore, or use a boresnake.
4, Repeat as neccessary.
5, When you do fire for group, make absolutely certain that you do everything exactly the same. Same position, same support, same sight picture, same same same. .22 rimfires because they are so slow demand absolute consistency in the shooters form and followthrough. (boring I know)
6, When you get fliers or outlying hits, examine your form first, then consider ammuniton, particularly inexpensive ammo. High quality consistent match grade ammo is more expensive for a reason.
What you are accomplishing is having each brand tested under the same circumstances, thus the differences you will find will be ammo, not you or how fouled the barrel is.
Roger