Wm.Traynor wrote:straightshooter wrote:If you mean the screws that attach the pressed metal upper to the lower alloy ring then they are 6-40. In my opinion those pressed metal style rings are one of the worst rings ever manufactured.
I found out today how absolutely right you are. It was when my ring lapping tool was put to use this p.m., that I discovered that these rings put a bend in the scope
No wonder the scope needed a trip to Nioa's vet
The machined rods that come with the kit, simply point in different directions
I have attacked the ring-bottoms with heavy pressure and #240 grit paper and the out-of-true condition, is much improved. Will do some more tomorrow otherwise I'll be going shopping.
Too bad about all that, after I had done a great job of repairing the base-screw slots and trimming the new shcs for the rings
Something is not right.
The problem with this style of rings is that they effectively only have two points of contact between the ring assembly and the scope tube and were originally intended for use with steel tubed scopes like the ancient weavers where a lot of clamping force was feasible.
In the dark ages of benchrest some people would use a ball mill to make a shallow slot in the alloy base to thus provide three points of contact for the scope tube and in so doing eliminate the problem of lateral movement of the scope within the rings.
You can achieve a similar result by giving a single wrap of good quality electrical tape that gets compressed under the ring and provides a more secure fit within the ring assembly.
Have you considered that the indicated misalignment is due to any other reason before attacking the ring bases?
The ring bases are a linear extrusion and it is extremely unlikely they are out of true.
Two piece weaver and picatinny rails can be out of alignment.
Even one piece alloy rails can easily bend.
Bending forces can be introduced by haphazard positioning of the rings on the rail or in the assembly sequence.
If you give up with these rings then choose machined steel rings which are split across the center as replacements.
Avoid like the plague any that claim to be 1"/26mm compatible.