Proper Firing Pin Protrusion?

twofewscrews

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What is the proper amount of firing pin protrusion for a 10/22?

Does the amount of firing pin protrusion differ from firearm to firearm?

Is the amount of firing pin protrusion the same or different for rim fire, center fire, and shot shells?

Thanks for input ahead of time
 
I am just an amateur, so I am certain friendly forum qualified gunsmiths will chime in with their experience.

Firing pin protrusion measurement is pretty easy. The simplest tool is the Brownells in accompaniment with calipers, particularly
if the object to be measured cannot be removed from the gun, e.g. revolver v. AR bolt / shotgun bolt. For the the AR & shotgun bolts I like to use the digital iGage.

Yes there is a range of protrusions , mostly .045-.060" depending on the platform.

A few examples.

Screenshot 2024-02-16 at 6.20.48 PM.png Screenshot 2024-02-16 at 6.21.06 PM.png IMG_8870 copy.JPG IMG_7795 copyGunsmith iGage Digital Depth Gage Gauge 2023 08.06.33 copy.jpg IMG_7782 copyGunsmith iGage Digital Depth Gage Gauge 2023 08.06.33 copy.jpg IMG_7790 copyGunsmith iGage Digital Depth Gage Gauge 2023 08.06.33 copy.jpg IMG_7793 copyGunsmith iGage Digital Depth Gage Gauge 2023 08.06.33 copy.jpg
 
With rimfire you want to have the length short enough so dry fire does not damage the breach face. Once damaged you will have FTF problems. Some guns are made so you can some not. Center fire, set to what the mfg suggest.
 
With rimfire you want to have the length short enough so dry fire does not damage the breach face. Once damaged you will have FTF problems. Some guns are made so you can some not. Center fire, set to what the mfg suggest.

Yup. If the info I've found is accurate, the maximum firing pin protrusion on the Ruger 10/22 is set back .005 or so from the bolt face which is why its safe to dry fire even though its a 10/22.

What I haven't been able to find is the factory or recommended spec for firing pin protrusion on a Ruger 10/22. Over on rimfirecentral .025 to .035 was suggested by someone but that thread is no longer active and I'm not sure if that was what Ruger recommended, how they come from the factory, or what he found worked best.
 
Yes there is a range of protrusions , mostly .045-.060" depending on the platform.

I found one thread, 4 years old and dead, that claimed the protrusion is dependent on the size of the primer not the platform.
And I quote "05-.055" for srp, .059-.062" for lrp, and quality made shotguns the same as lrp"
I assume srp stands for small rifle primers and lrp for large rifle primers.
 
The OP asked specifically about a 10-22. The answer of .005” less than the bolt recess is correct, don’t need all the other rabbit trails.
 
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