Originally Posted by sabotloader

MountainDevil54

I think you may be wrong and misguided in your efforts here. The factory "o" ring is used to seal the threads of the bushing from blow back debris in the reciever frame. It is not intended as a bushing stop or head space adjuster. When the bushing is installed as designed it bottoms out on the reciever frame, which stops its rearward movement when the blow back pressure hits the nose of the primer. It also stops forward movement when the hammer stikes the the firing pin. Inserting a thicker "o" ring will not stop the metal fatigue the threads of the bushing will may possibly incurr as it is driven rearward by blow back pressure.

As you suggested else where if you were to replace that 'o' ring with a metal shim, or even a metal shim between the base of the firing pin bushing and frame - then you might be on to something.

A simple e-mail to Mike Bellum with this information would confirm what is being discussed here.

If a simple "o" ring were the answer to the problem you think Mike might have used that a long time ago instead of developing metal spacers, then again why has he not done that for the CVA line.

Another thing I would ask you to do - submit this thread to CVA and see what they say. I could be wrong but I would need CVA to say so.