IT's NOT harder hitting , if both .177 and .22 pellets are hitting the target @6ft/lb ,thats 6 ft/lb for both , mac are you having a blonde moment
sorry to confuse vwman but mac is correct .22 does hit harder.
Power is not as simple as the ft lb reading that's just the velocity at the muzzle.
a .22 running exactly the same power as a .177 in ft lb at the muzzle and identical pellets just bigger the .22 will retain more power down range due to the ballistic coefficient being roughly 25% better.
larger pellet holds more energy down range, heavier pellets carry more momentum even in the