Now, that's interesting.Last year I bought a pristine, supposedly never fired ROA of 1990s manufacture and to my dismay Hornady .457” round balls from two lots (and all measuring properly) were a loose fit in the chambers and the balls crept forward under recoil even with light charges. I got rid of it soon after, I’d of had to use custom molded or grossly oversized commercial balls.
I was a cowboy action shooter for a number of years. Rugers are very popular revolvers in that sport. You would be amazed at the number of CAS participants who are utterly convinced that Ruger chamber throats are undersized, and they have them reamed. A lot of these folks measure the chambers with calipers, which guarantees an undersized measurement. Accurate measurement requires plug gauges, or that the chamber be slugged. This usually occurs with the
This is not to disparage Cowboy Action Shooters in general. They are a fine bunch of people. It's just that the Ruger chamber throat issue seemed overblown to me.
Ruger will sometimes replace buggered parts and they are very good about fixing factory defects.