LOL - "What is the answer to Life, the Universe, and Everything" If we knew this we would be on a beach in the Bahamas
Sorry bud, you have to do the leg work on this one for your own gun, as everyone's is different Even batch numbers of the same pellet make a difference when your getting pedantic, and sometimes a crap gun can be a golden goose with the right pellet. My only steer would be stick to the big brands and forget all the fringe ones along with anything flat/pointed/hollow etc. A domed pellet will always out perform these on ultimate accuracy over distance cool:
Start with JSB/AA/H&N/Bisley/Crossman etc. and your on your way, but even those would give you 30+ pellets to try in either .177 or .22 given the depth of their offerings