While the product description does not mention it, these rings are ideal for 22 LR but in my opinion are not up to the task of handling the significant recoil of heavier cartridges. After installation (easy) and shooting off 150 22 LR shots the rail mounts had loosened. Because they are quick release, it is easy to check them and keep them snug. They have settled in now and work fine. With only one screw on each side of the rings a loose screw equals a drifting zero. Bottom line is these rings are good value, light weight, look sharp, are easy one and off, but are not built for the pounding center fire rifles deliver.
Pros: Good value and features. Light weight
Cons: Not strong enough to high powered rounds
This review was written in the old system and had content requirements that are different than reviews written today.