Used to see quite a few RG and similar junk .38's on guards, probably because they were cheap and the guards didn't really care about guns. They were poorly paid, too.
The real lulu was a guy I worked with who wore a Ruger Old Army cap and ball .44. It was what he had. He had a dangerous post protecting a parking lot used by the phone company. Some of their female operators were also whores and their pimps were around. That sometimes led to violence, and there were holdups there.
I worked the inside desk, where all personnel entered and left the phone bldg. I wore a S&W M-64 .38 in a Safariland holster. One day, an FBI agent on his first assignment after graduating the new agent course at Quantico asked me to back him up as he tried to arrest a felon wanted for interstate flight and other crimes. One of the operators was his GF and she tipped him off by phone that we were waiting for him. He didn't show. Another woman later told me what'd happened. The agent wore an issued M-13 in an issue holster. I forget the brand but recall the appearance.
I soon got a .357 S&W M-66-3 and it became my primary duty weapon when I worked security jobs. I occasionally wore a Ruger GP-100 or a Ruger Security-Six, always in Bianchi or Safariland holsters like Bianchi's No. 5BHL or the Safariland M-29. Safariland doesn't make that now, but El Paso Saddlery does, as their Model 2. Basically the same design. I wore two speedloaders on my Bianchi River Belt, and my leather was basketweave stamped. I've never worn floral carved holsters. Not a cowboy, let alone a drugstore cowboy.
My guns had four-inch barrels, save for the SS , a six-incher.
Never wore an auto, because I'd have had to qualify separately with it and buy expensive duty leather.
Today, I'd make the effort to qualify with an auto and buy the leather. I'd wear my Beretta M-92FS and carry 124 grain JHP ammo like Speer's Gold Dot or the Federal HST.
Multiple felons are more common today, and there's the terrorist threat.