Correcting Single Shot Light Primer Strikes:
- Remove the Rossi Hammer Extension1
- Check and adjust the firing pin protrusion at the breech face2
- Adjust Hammer Spring3
2Make sure that the hammer nose is allowing the full extension of the firing pin. The length that the firing pin should be exposed outside the breech face is approximately .042". This work is detailed in Light Hammer Strikes.
3f100cleveland told me via PM that he had to bend his hammer spring to solve his issue on the R762 but I did not need to go this far. Hopefully he will add his comments to this post.[hr][/hr]
The problem I had existed with reloaded ammunition only using CCI primers. I wasn't about to stop reloading or switch primers, in that I keep about 40K on hand, I would sell the rifle first. I started with step two, which I'm happy I did as the firing pin protrusion was poor, but I still would try step 1 first. The work on step two brought be to about 95% reliability with the CCI primers and removing the extension has brought the dependability to 100%. I have shot the ammo with Federal, PPU, Remington, Winchester, and Wolf factory ammo. I have reloaded Federal, Fiocchi, PMC, PPU, and Winchester brass with CCI primers and they have been proofed at 100%. I toss Remington brass as it uses small rifle primers. The same for S&B brass but it has a undersized large primer pockets and have damage every case trying to correct them with an appropriate tool.