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Security 9 light strike issue resolved, finally!

This is a discussion on Security 9 light strike issue resolved, finally! within the Ruger Pistols forums, part of the Pistol & Revolver Forum category; I bought a new Security 9 a few months ago and from day one I had light strike issues with it. Lately it's been 2-3 ...


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Unread March 2nd, 2020, 10:20 AM   #1
 
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Security 9 light strike issue resolved, finally!

I bought a new Security 9 a few months ago and from day one I had light strike issues with it. Lately it's been 2-3 times per mag which is pretty bad. I was shooting factory Blazer Brass 115's and 124's as well as my reloads and the problem persisted no matter what ammo I used.

I read on a reloading forum that CCI primers were harder than some others so I loaded up some ammo using winchester primers but that didn't help either.

I have 2 Smith & Wesson 9mm's that have no problems with the same ammo that wouldn't run in the Ruger so I was certain the problem was with the gun. I took it to the range yesterday with 4 different combos of primer, charge and bullet weight. None would run without frequent light strikes. And then I noticed something that was the key to solving the riddle.

Every time there was a light strike there was a piece of primer stuck in the firing pin hole. I saved a couple of them:





They are perfect circles like they were punched out by a machine, so that was the clue I needed. When I got home and disassembled the firing pin and spring I could see that the hole the firing pin goes through was completely flat with a sharp edge to it.





I examined both of my Smiths and that same hole on them is chamfered. I think on my Ruger the firing pin ignites a round and when the case is pushed back the sharp edge cuts out that piece of primer which then gets stuck in the hole. Then when the pin tries to fire the next round the debris blocks it and causes the light strike.

I got a small cone shaped stone from my dremel kit and twirled it between my fingers in the hole till I could see a slight chamfer, then polished it up with some 1500 grit sandpaper. If you look close I think you can see the difference in this pic.





I'm happy to say that did the trick! The gun is now working the way it should. I went to the range today and fired 4 different ammos for a total of 103 rounds and didn't have a single problem. It eats factory, it eats reloads, 115 grain, 124 grain, CCI primers, Winchester primers, all of it works. This is how my Smiths have always been. I'm just glad to finally have the Ruger reliable as well.

I would think that the hole should have been chamfered at the factory and a step was missed or something. Anybody examine that hole on their own Ruger, especially if you have a Security 9, as I'm curious?



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Unread March 2nd, 2020, 01:59 PM   #2
 
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Good fix!
Maybe you need to notify Ruger about it.
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Unread March 2nd, 2020, 03:18 PM   #3
 
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I'll check my security 9.....my early issues were stovepipe and resolved with 124gr ammo. It runs like a top now.

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Unread March 2nd, 2020, 04:14 PM   #4
 
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OP I loved your story. Congrats to you.
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Unread March 2nd, 2020, 05:10 PM   #5
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mmb617, That's some good trouble shooting and a good fix. This same issue could apply to most any brand or model of pistol.
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Unread March 3rd, 2020, 07:03 AM   #6
 
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Quote:
Originally Posted by capecuddy View Post
I'll check my security 9.....my early issues were stovepipe and resolved with 124gr ammo. It runs like a top now.
Since you mentioned stovepipes...

One other thing I didn't like about the Security 9 when I first got was that it had more muzzle flip than my M&P Compact 9 which is a very similar sized gun. Comparing the two I saw that the barrel and guide rod/recoil spring assembly on the Ruger were considerably lighter in weight than those on the S&W, so I thought that adding some weight to the front of the Ruger would help with the excessive muzzle flip.

There isn't anything I can do about the barrel weight difference but I decided to replace the hollow guide rod on the Security with a SS solid one to add front end weight. And that did noticeably decrease the muzzle flip, but it also introduced a stovepipe problem that wasn't there before. So I went back to the stock rod, as the light strike issue was more of a concern and needed addressed first.

Once I'd fired enough rounds to feel confident that I'd fixed the light strike problem I switched back to the aftermarket guide rod and so far haven't had any stovepipes. That might just be because the gun is now more broken in than it was the first time I tried that mod.

More testing is on tap but for now it looks like the gun is working great with both 115 and 124 grain bullets. I was very unhappy with this gun but if it continues to perform like it did yesterday I will be turning that frown upside down.
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Unread March 3rd, 2020, 10:20 AM   #7
 
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Interesting. I've not experienced this primer cookie cutter effect on any pistol, so it's never occurred to me to pay particular attention to this area before. I don't have a Security 9, but I looked at my American, 9E, a P85 slide, and a couple of different P89 slides I have, and the striker/firing pin holes on all of them looked just like your Security 9 when you first got it; there was no obvious chamfering of this opening in any of them.

I have no idea why this particular gun would do this, while others made in the same way do not. I also wonder if this is unique to your specific pistol or if others will find the same issue (or have found the same issue)? I'm glad you were able to correct the issue with your mod, but it would also have been interesting to see what determinations and fixes Ruger had made, had you sent the gun to them. I agree with dwarren, I would still notify Ruger of the issue and provide them a link to this thread.

Last edited by G. Scott H.; March 3rd, 2020 at 10:28 AM.
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Unread March 4th, 2020, 05:27 AM   #8
 
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Quote:
Originally Posted by G. Scott H. View Post
I looked at my American, 9E, a P85 slide, and a couple of different P89 slides I have, and the striker/firing pin holes on all of them looked just like your Security 9 when you first got it; there was no obvious chamfering of this opening in any of them.
Now that is interesting. I hope I hear from some other Security 9 owners as I'd like to know if they've had any similar issues and exactly how the opening looks in their gun.

It's such a small hole and hard to see but I could tell the edge was real sharp originally. The only thing I had on hand to compare were a S&W Shield and Compact. They are both striker fired instead of hammer fired but that shouldn't matter to the issue at hand. On both of them the firing pin hole is at least relieved of it's sharp edge and they both have an obvious bevel on the bottom part of the hole.

It's probably a matter of only thousandths of an inch and I could maybe have gotten away with less of a chamfer than what I did, but it just seems logical to me that a really sharp edge there is a problem. By my thinking the force of the explosion has to force the spent primer to the rear of it's pocket and when it hits against a sharp edge it will be cut. The degree of "sharp" that will cause a problem on that edge may not be detectable to the naked eye.

Quote:
it would also have been interesting to see what determinations and fixes Ruger had made, had you sent the gun to them.
The main reason I didn't send the gun in was that I had already installed a trigger and grip sleeve and I didn't want to remove them. And I like to tinker with mechanical devices and felt sure I could eventually trace and fix the problem. Plus I wasn't sure they wouldn't simply tell me to buy better ammo, as I've heard others say that's a common response.
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Unread March 4th, 2020, 02:46 PM   #9
 
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Quote:
Originally Posted by mmb617 View Post
The degree of "sharp" that will cause a problem on that edge may not be detectable to the naked eye.
That's very possible and may be the answer, similar to how the difference between a knife edge that will cut and one that won't isn't always discernible to the naked eye but can be easily felt.
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Unread March 4th, 2020, 04:53 PM   #10
 
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Quote:
Originally Posted by mmb617 View Post
Since you mentioned stovepipes...



One other thing I didn't like about the Security 9 when I first got was that it had more muzzle flip than my M&P Compact 9 which is a very similar sized gun. Comparing the two I saw that the barrel and guide rod/recoil spring assembly on the Ruger were considerably lighter in weight than those on the S&W, so I thought that adding some weight to the front of the Ruger would help with the excessive muzzle flip.



There isn't anything I can do about the barrel weight difference but I decided to replace the hollow guide rod on the Security with a SS solid one to add front end weight. And that did noticeably decrease the muzzle flip, but it also introduced a stovepipe problem that wasn't there before. So I went back to the stock rod, as the light strike issue was more of a concern and needed addressed first.



Once I'd fired enough rounds to feel confident that I'd fixed the light strike problem I switched back to the aftermarket guide rod and so far haven't had any stovepipes. That might just be because the gun is now more broken in than it was the first time I tried that mod.



More testing is on tap but for now it looks like the gun is working great with both 115 and 124 grain bullets. I was very unhappy with this gun but if it continues to perform like it did yesterday I will be turning that frown upside down.
"There isn't anything I can do about the barrel weight difference but I decided to replace the hollow guide rod on the Security with a SS solid one to add front end weight. "

Part number and source for that guide rod?

Thanks !

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Unread March 4th, 2020, 05:58 PM   #11
 
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Galloway Precision has them.
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Unread March 5th, 2020, 04:45 AM   #12
 
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Quote:
Originally Posted by capecuddy View Post
"There isn't anything I can do about the barrel weight difference but I decided to replace the hollow guide rod on the Security with a SS solid one to add front end weight. "

Part number and source for that guide rod?

Thanks !

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This is the guide rod I bought. I got it in 17 lb which is the stock spring rate.

https://gallowayprecision.com/ruger/...rity-9-pistols
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Unread March 5th, 2020, 06:12 AM   #13
 
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Just ordered one last night....I picked 17 lbs as well. Seemed like the right place to start given that it's the stock value.

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Unread March 5th, 2020, 11:51 AM   #14
 
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Quote:
Originally Posted by capecuddy View Post
Just ordered one last night....I picked 17 lbs as well. Seemed like the right place to start given that it's the stock value.

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They make quality stuff. I put one of their SS recoil spring/quide assemblies (2# over stock) and a SS striker indicator in my 9E, and both have functioned flawlessly.
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Unread March 8th, 2020, 07:37 PM   #15
 
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Well, I got the assembled stainless 17 lb spring, went to the range and >cringe< I only has 115gr 9mm ammo. Loaded up the mags and started shooting.....works as well or better than ever. No hangups of any kind.

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