I guess I'm one of the lucky people that don't have regular problems with stainless steel MkII's; A 5-1/2" SS bull barrel that's absolutely great just the way it is; A 6-7/8" gov bull barrel that's real good-(trigger is not as good as on the 5-1/2" MkII; and A 10" SS that (after having to send it back to Ruger one time- couldn't hit the side of a barn out of the box), shoots about a 1" group at 100yds. Been using mainly standard Winchester .22 ammo with great results!