Author Topic: Popped Primer Problem  (Read 10826 times)

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murray

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Popped Primer Problem
« on: April 28, 2008, 11:28:52 AM »
Some may call it "Pierced Primers" but whatever you call it, it's a problem for many SKS owners trying to use "that" ammo. While this may not cure 100% of the problem with all rifles, it seems to be having some very positive results. And you can learn about "it" by clicking on the link at the bottom of this post, then click on the link at the top left of that page. It's currently a PDF doc but should be changed to just another page at murraysguns.com in the near future.

The "before" pics you'll see there are a good indication why you should not dry-fire the SKS with an original firing pin, and how doing so, (or the previous owner did?) is contributing to the "popped primer" issues.

All feedback is welcome!

http://www.murraysguns.com/poppedprimers.htm
« Last Edit: January 30, 2013, 06:17:49 PM by murray »
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RedFalconBill

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Re: Popped Primer Problem
« Reply #1 on: April 28, 2008, 12:38:03 PM »
Some may call it "Pierced Primers" but whatever you call it, it's a problem for many SKS owners trying to use "that" ammo. While this may not cure 100% of the problem with all rifles, it seems to be having some very positive results. And you can learn about "it" by clicking on the link at the bottom of this post, then click on the link at the top left of that page. It's currently a PDF doc but should be changed to just another page at murraysguns.com in the near future.

The "before" pics you'll see there are a good indication why you should not dry-fire the SKS with an original firing pin, and how doing so, (or the previous owner did?) is contributing to the "popped primer" issues.

All feedback is welcome!

Ben, I looked at your source code and the link is not written correctly.  Interesting reading and yet another reason why I had the good sense last year to send my bolt to you.  Thanks again for your work in this area to benefit all SKS owners.

I'm linking the .PDF here for people to click on and read at their leasure.

http://www.murraysguns.com/poppedprimers.htm

« Last Edit: January 30, 2013, 06:18:55 PM by murray »

murray

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Re: Popped Primer Problem
« Reply #2 on: April 28, 2008, 01:19:23 PM »
You're more than welcome. Glad to be able to help.

And Thank You for putting that link up. Very handy. It should be changed on our site fairly soon and the link will just lead to another page at Murrays.

https://murraysguns.com/shop/

If you feed it junk ammo, why should you expect filet mignon results? Well now you can, with our new "Neck & Throat" chamber reaming service!

Zeeba

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Re: Popped Primer Problem
« Reply #3 on: January 30, 2013, 03:43:59 PM »
I finally got to shoot my newly acquired SKS this morning.  I purchased it immediately after a snowstorm up here in PA, and was delayed further by some single-digit temperatures and more snow.  While waiting for the weather to cooperate, I did some research about the rifle and decided I didn't want the Slam Fire Surprise, so I ordered a spring-loaded pin from Murray's.
Today, the temp hit 55°, so it was off to the Shootin' Hole to check the sights out, and run the 'new' rifle through its paces.  Using Tula Ammo, I started getting misfires after about 25 rounds were through the gun, but after re-chambering them, they'd discharge as expected.  Coming up on 55 rounds, the gun wouldn't fire at all, which necessitated an impromptu field strip, expecting a broken firing pin.  The pin was stuck pretty badly in the bolt, and I couldn't free it up with the rudimentary tools I had in the field, so I headed home for further investigation. 
Upon disassembly, the pin came out with a little tugging, but there was no sign of the return spring.  using a tiny hook fashioned from MIG welding wire from the hammer end, and some skinny punches from the bolt face end, I managed to extract the contents of the firing pin bore.



I didn't pay much attention to any of the popped primers stories that I'd heard about, but I shoulda.  Going back to Murray's site, I read up on the problem, and sure enough, there was a burr raised around the firing pin hole on the face of the bolt.  Using a fine jeweler's file and a flat stone, I removed the burr, and then chamfered the hole as seen in the below photo.



I replaced the mooshed spring with the spare that Murray's included (thanks, Ben) and ordered 5 more - just in case.  Yeah, I shoulda read more about that primer problem, but, like most people, I figured it wouldn't happen to me.
It looks like the weather is going to take another dive over the next couple of days, so it'll be a while before I run the gun through the wringer again.  I certainly hope it's fixed for good this time.   It's going to be some time before I can acquire some boxer-primed brass and start reloading my own, thus eliminating this glitch.
I'm retired.
You're not.
Have a nice day at work tomorrow.

murray

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Re: Popped Primer Problem
« Reply #4 on: January 30, 2013, 06:43:32 PM »
Great pic of the bolt face and excellent job of countersinking the FP hole!
https://murraysguns.com/shop/

If you feed it junk ammo, why should you expect filet mignon results? Well now you can, with our new "Neck & Throat" chamber reaming service!

murray

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Re: Popped Primer Problem
« Reply #5 on: October 23, 2013, 12:45:25 PM »
Anyone that is keeping up with this Subject/Thread should check out our last post on 10-23-13 in this Thread.
http://www.sksboards.com/smf/index.php?topic=38792.30

https://murraysguns.com/shop/

If you feed it junk ammo, why should you expect filet mignon results? Well now you can, with our new "Neck & Throat" chamber reaming service!