I've been using Talley Lightweights on everything for many years now. They are actually stronger than most steel mounts since the lower ring and base are made together. One less thing to go wrong. They are lightweight, reasonably priced, and easy to mount compared to many others. Lots of folks use them on big guns with no problems.
The only issues are when a muscle bound wrench turner over tightens them. I've seen a few guys manage to break the ring doing that. But I've never known of any issues if they are mounted right.
If you're talking about the Weaver 4X4 rings commonly sold at Walmart, they are very functional for the money. I'd trust them on anything. They are a little more complex and harder to mount than the Talley's. And they don't look as good, but they do work.