Rock-solid.I use these on my .270 and have had absolutely no problems. They are 100% steel and lock your scope in tight. use with a bit of blue lock tight for an unpresidented hold—better quality than any ring I have ever seen or used.

I want rings to be sturdy and to keep the scope stable. There are lots of rings that can do that, but these rings have two extra features that set them apart. Their plastic inserts protect the scope from damage from the rings, so expensive scopes don't get married. And those same inserts can be changed to enable adjustments in vertical and horizontal aiming if you need to set up to shoot long distances or if you need to adjust for a misaligned receiver drilling. I have seven sets of these mounts and swear by them.

I've used these scope rings for years, and they are the absolute best thing out. NEVER mark up a scope again. I've seen the regular steel rings clamped down so tightly that they've indented the scope tube. Seen marks cut into the sides from sharp edges on rings that are supposedly high quality. None of this happens with Signature rings. They also hold the scope without putting anything into a bind, yet tight where it doesn't move. IMO they should be REQUIRED when you buy a proper quality scope! BTW they're also reusable time after time... Money well spent.

This scope rings comes HIGHLY recommended from a gunsmith buddy of mine, who builds custom .50 BMG rifles. I used to use TPS rings until they got to be overpriced. I switched to these after a visit to Buckeye Sports, whose gunsmith said he uses these on his 50's and has never had a scope move on him. I love these, excellent holding power, and no ring marks on your expensive scope.

I have about ten sets of these scope rings and LOVE them. They will NOT mark a scope, and I can center the scope with the rings before adjusting the crosshairs to allow me to operate the reticle in the center of its range for maximum efficiency and accuracy.