does this winchester m22 come in a black box of 300 rounds? if so it's one of the few 22lr brands that i avoid: very dirty and smokey with some duds to boot even in a ruger revolver. i also pass on remington thunderbolts and the new browning 22lr ammo.
try any cci except low powered "quiet" rounds as they don't have enough oomph to cycle a semiauto action. cci "standard" and up is fine for semiautos as are federal, aguila and blazer. remington golden bullets found in 100 round boxes at walmart run well too.