Bug, how many rings did you use on the 460? I had one on my 460 and 500 x frames and on a 45-70BFR shooting loads with data for the Ruger #1 (440gr @1660+ out of a 7.5" barrel)and I've never had the slightest problems, also did you check ring alignment before you tightened them down? I've also used them on the 375 and 309JDJ's and on the 45-70 in the contender with the same results.

I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them. John Wayne-The Shootist