I’ve had a good many m10s. I’ve even bought them new. The K frame S&W is most trouble free revolver I know of. They also have more than adequate accuracy for the job they were intended for.
I only have one 4” with Hong Kong Police stamped in back strap. Looks like new and shoots 158gr like it’s suppose to. I have a couple 15s and 14s. I can shoot a K38 much better because of weight and longer sight radius. The sight picture on adjustables has always been sharper even when I was young. The Colt sight is only thing I liked about Colts. Colt made its reputation with SAs and will give them Brownings auto pistols too, S&W has been the leader in DAs for a good while.