The rifle wants what the rifle wants LOL
I shoot 10 shot groups when testing pellets.10 shot groups are what Tom Gaylord(The Godfather of airguns) recommends for testing pellets. Actually, if you test 10 pellet types and end up with 2 or 3 that shoot best, then test those again to make sure you have chosen the best one for your gun.If the first 5 shots have a big spread, then you can stop at 5 shots with that pellet type.