I used to think the Ruger revolvers were indestructible. I got a Redhawk from an estate sale. It felt a little sloppy but, hey, they're indestructible. I compared it to my Dad's early production Redhawk which has maybe one box of factory ammo through it, it was as indeed sloppy. Maybe Ruger made them to a much higher standard early in production. Maybe the previous owner shot the heck out of it. Don't know.
MidwayUSA had the parts commonly worn out according to the internet. Once replaced, about half the slop was gone but nowhere near as tight as my Dad's revolver. Bottom line, the Redhawk and Security Six revolvers are built like the proverbial brick shit house but they do wear.