RE: most accurate factory .22
I honestly wouldn't be that thrilled by a .22 that shot just an inch at 50 yards. My Ruger 10-22 will do that with cheap factory ammo crap. I got one for ya
Winchester model 69 single shot bolt, old as my father I think (he's 65) 27 inch barrel.
I have two of them, they'll both shoot quarter inch at 50.