Pierced primers

[AZone]

My Ruger Blackhawk convertible doesn't pierce primers when the 38/357 cylinder is used, but it pierces 30% of 9mm . Firing pin protrusion is about .042",any ideas?
Thanks

 

[edwardware]

All these words, and no pictures?

Protrusion and shape of the pin both matter. Pin clearance through recoil plate matters. Pressure and primer cup thickness, of the cartridge, both matter.

If you're on the edge, headspace might matter, not for pressure, but for primer extrusion and reseating effects.

In short, Pictures!

 

[243winxb]

it pierces 30% of 9mm

The 9 headspaces on the case mouth. Possible short chambers or 9mm brass needs trimming.

And yes, i have found 9mm longer then saami maximum trim length.

Had 1 hole on the 9 cylinder chambered to deep. Misfired. Had to ship gun back to Ruger.

 

[Palladan44]

Headspacing. Trim the 9 brass a few thou shorter and that should solve it.

Unless they're is some blowback happening while hammer all the way forward. Something like this would occur on a Smith and Wesson with fixed hammer..... I forgot the firing pin is inertia operated and not fixed to hold forward, so you're problem is likely my first sentence.

 

[Otto]

Common problem. Read the second paragraph on page 17…..

https://ruger-docs.s3.amazonaws.com/_manuals/blackhawk.pdf