I'm right handed and left eye dominant so want a longish gun to practice on which isn't going to blow out my shoulder. .22 lr AR Platform is also an option, but I don't have anything else in the .22caliber, so would prefer a pistol caliber if possible, 9mm preferred
.22 is very cheap, even if you need to buy specialty ammo. most(picky) conversions can run CCI mini-mags and those are about 10c/round