We have a M&P 22 and use it for Steel Challenge, awesome pistol, very reliable and great gun to get use to the feel and function of the bigger caliber M&P series. Our's no hiccups, greater than 2k rounds through it. My best selling .22
Walther P22, had one, no longer have it for a reason and won't be looking for one in the future
Ruger SR22, very reliable, nice gun.
Sig Mosquito, ammo picky, not a fan, go with a Sig 226 in .22 or a conversion kit for a larger caliber Sig