Yeah boy!
Always thought those 6-inch Model 10 variants were considered a common barrel length but they sure don't turn up very often. They are a fine way to do .38 Special and an elegant antithesis to a paltry .38 snub. The .38 Special is so much more than a cartridge fit only for a 2-inch barrel.
The 4-inch Model 10 Heavy Barrel still has to be one of the most useful handguns on the planet.