My ruger vaquero is chambered in .40 S&W, same ammo used by Sherriff and CHP. The gun is a "second", slightly flawed San Diego County Sheriff commemorative edition without the custom laser engraved grips. Either my Dad or brother got one with the custom grips, but they were slightly off as well which was why they were included with the gun. It was about a $800 gun if I recall correctly, and I got it for about $250 (again if I recall correctly) because they pooched the engraving on a whole bunch and let law enforcement officers in the area buy them cheap.
It's a nifty gun, but the sights are pretty far off. If it wasn't a commemorative edition, I'd probably shave off the front blade sight since it's too tall. It shoots straight though, even though it's a sixgun using auto ammo.