I bought several of these rings and installed them without problems UNTIL the other day.  I was mounting one lower ring on my Savage 93 bolt gun until it tightend up (the screw did) but noticed the lower ring still was loose. The other lower ring didn't have that problem and tightend up properly.  I switched off the problem lower ring with another one (same type) and it did tighten properly.

Being curious, I bought a different set of rings (Leupold Rifleman series) from a local gun shop and tried them.  Everything worked fine and I noticed that the Leupold rings were beefy compared to the wimpy Weaver ones.  The small clip that tightens the ring to the rail is thin on the Weaver and heavy duty on the Leopolds.  Hmmmm.... Well I ditched all the Weaver ones and changed everything over to the Leupolds.  I hear horror stories about bad scopes, inaccurate barrels, my gun not shooting consistantly straight, ect, and most of the time it's a bad scope mount or improperly mounted scope.  I can't trust these rings at all.

Look at the picture of these rings and notice the thin rectangular piece of metal underneath the tighting screw.  Then compare it to a Leupold "Rifleman series" ring and tell me which one do you want on your gun.

Price difference is twice for the Leupold but $18.00 for the good one vs $9.00 for the cheap one shouldn't be a show stopper. Weaver does make higher end mounts but this line is marginal at best.
I bought several of these rings and installed them without problems UNTIL the other day. I was mounting one lower ring on my Savage 93 bolt gun until it tightend up (the screw did) but noticed the lower ring still was loose. The other lower ring didn't have that problem and tightend up properly. I switched off the problem lower ring with another one (same type) and it did tighten properly. Being curious, I bought a different set of rings (Leupold Rifleman series) from a local gun shop and tried them. Everything worked fine and I noticed that the Leupold rings were beefy compared to the wimpy Weaver ones. The small clip that tightens the ring to the rail is thin on the Weaver and heavy duty on the Leopolds. Hmmmm.... Well I ditched all the Weaver ones and changed everything over to the Leupolds. I hear horror stories about bad scopes, inaccurate barrels, my gun not shooting consistantly straight, ect, and most of the time it's a bad scope mount or improperly mounted scope. I can't trust these rings at all. Look at the picture of these rings and notice the thin rectangular piece of metal underneath the tighting screw. Then compare it to a Leupold "Rifleman series" ring and tell me which one do you want on your gun. Price difference is twice for the Leupold but $18. 00 for the good one vs $9. 00 for the cheap one shouldn't be a show stopper. Weaver does make higher end mounts but this line is marginal at best.