You need to go buy a coupl etins of cheap pellets and plink at some pop cans for abotu 500 shots. THEN go buy a tin of as many pellets as you can find, and see which ones shoot.
Airguns are like real guns. Just because one .308 likes 44 grains of BL-C(2) doesn't mean another will. Just the same, you could have 2 stoeger x10s, and one like crosman pointed, and the other likes predator polymags. I have a Crosman phantom with a modded piston and shimmed spring, and believe it or not, it shoots the best with the CHEAP daisy "hollowpoints".