Conversation so far:
what caliber of rifle did the rifleman use
the rifle used on the set of The Rifleman, an 1892 Winchester caliber .44-40
Who is in the tv show the Rifleman
The rifleman stars Chuck Connors as rancher Lucas McCain and Johnny Crawford as his son Mark McCain

Question: where was the TV show set
Self-contained rewrite: Where was the TV show The Rifleman set