I was reading an article about Steve McQueen that mentioned this TV show. I found it was available on Prime, so I decided to watch it. I like it because it's not filled with profanity.
His Winchester was known as a "Mare's Leg", and the original was a 44/40 caliber. The people in charge didn't like the size of that round, so they loaded his cartridge belt with 44/70 rounds. That was one of many good shows of that era.