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PostPosted: Mon Oct 13, 2014 10:39 pm 
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For the first time ever, I've come across someone who has actually had broken firing pins from an incorrect hammer strike angle. I always corrected this on general principle, but now there is some validation.

He had a modified hammer with the wrong angle, and apparently broke several pins at around 50 rounds each. He corrected the hammer strike angle and seems to be having good results now. If I can get his permission and some images, I will put them here too.

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PostPosted: Mon Oct 13, 2014 10:54 pm 
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Location: Arkansas, USA (NWA)
WOW! :shock:

I always figured this was a possibility, but I've never seen it. Hope to see some pics!

I also would IMAGINE peening the firing pin in the forward position COULD become an issue (achieving irregular primer strikes or uncontrolled ) if this incorrect strike angle were applied with incorrect ratio between the hardness of either firing pin or bolt tail and that of the hammer, i.e. soft pin or tail and hard hammer. However, this is just my own conception.

This thread just gets better and better. Thanks for posting this, GunFun. 8-)

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PostPosted: Mon Oct 13, 2014 11:20 pm 
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The Ammo channel did a series recently on making a gun from a combination of a yugo parts kit and scrap metal. Part of the idea was to make as many parts from scratch as possible, figuring out dimensions from the torch cut parts without much outside help or info. He self made the FCG (for compliance) by tracing the takeoff parts on mild steel. He decided that he didn't like the hammer face peening so he welded harder material there & re-shaped. I left him a message that he should keep that area soft, but maybe he should worry about soft metal on the sear and disco edges wearing to an unsafe condition.

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PostPosted: Tue Oct 14, 2014 12:53 am 
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Well-thought, sir.

I am no gunsmith, but I would do it exactly as you said above. Sounds like an interesting show!

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PostPosted: Tue Oct 14, 2014 3:08 am 
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Here is slow mo footage of the hammer striking with a corrected face angle in the gun that had been breaking firing pins with the bad hammer.

http://youtu.be/2Pel_ShfDEo?t=56s

Thanks to Malcom Mitchell for permission. I hope he'll give us some good still pictures of the broken pins and bad hammer.

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shotguns, some gunsmithing, reloading, fabrication, knife making, etc.

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PostPosted: Fri Jan 29, 2016 2:58 am 
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GunFun wrote:
Here is slow mo footage of the hammer striking with a corrected face angle in the gun that had been breaking firing pins with the bad hammer.

http://youtu.be/2Pel_ShfDEo?t=56s

Thanks to Malcom Mitchell for permission. I hope he'll give us some good still pictures of the broken pins and bad hammer.

"Video is unavailable". :(


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PostPosted: Fri Jan 29, 2016 4:27 am 
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I should have downloaded it and saved it.

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PostPosted: Fri Jan 29, 2016 6:32 am 
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Understood.


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PostPosted: Wed Mar 29, 2017 3:29 pm 
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Does anyone know first hand if this works in a Pioneer? I'm looking to improve the trigger (with no gunsmithing experience... yet) and having a hard time getting any traction.


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PostPosted: Fri Mar 31, 2017 8:29 pm 
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I believe the pioneer models have a teeter totter arangement like a sporterized saiga. Is that correct? If so, you can do much of the same mods, but you must grind the trigger off of the trigger body and make sure the lever from the actual trigger correctly interfaces. That system uses a rivet to limit pre travel.

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shotguns, some gunsmithing, reloading, fabrication, knife making, etc.

I'm a firearms/NFA attorney in Wa. Let's combine business, pleasure, and stamps.

http://www.youtube.com/user/armaggedonite


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