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Discussion Starter · #1 ·
I took apart my PC carbine for a quick clean today and noticed some small deformation at the corner of the bolt. It doesn't seem to be too bad at the moment but it will definitely scratch up the receiver if it get worse. I've put about 500 rounds though it in the past 2 months. Has anyone noticed this? I wonder is this just a "break-in" wear or something I need to talk to Ruger about?

I'm using the factory Glock magwell in case anyone is wondering.
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I'm presuming that the firearm has been thoroughly cleaned, and properly lubed. I also don't know if this is "normal" wear or not.

Suggest you take good pix on all sides/places of the bolt where this deformation is taking place, and save pix. Suggest you also take good pix of the part(s) that are causing the deformation as well.

Suggest you send pix to Ruger for advice and possible service. Picture is worth 1,000 words. Don't mess with it until you hear back with them. See what they say.

The following might well affect your Ruger Warranty: If you can FULLY SUPPORT the area DIRECTLY behind the "raised" bit of metal (I presume the metal is deformed/raised on both sides of the bolt body, I suggest using a small hammer with a flat face to gently tap the raised metal and force it back down a bit. You are just "moving" the metal a little bit, and forcing it back nearly into original position. Don't expect perfection, just an improvement. Suggest you examine the rest of the bolt body for other possible flaws; for example, the screw in the picture above seems to have some raised metal at the circumference of its recessed hole. Sometimes such things can be "moved" back into original configuration, sometimes it is best to gently remove such imperfections

Keep an eye on things, and see what happens.
 

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@Matthew23 - You made me look ;)

This is my bolt from my PC Carbine with about 2,500 rounds through it. The picture makes it look worse than it is in real life.

Rectangle Wood Automotive exterior Composite material Gas


That notch is what the last round hold open lever catches:

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That lever is pushed up when you assemble the receiver into the stock, and then pushed up to stop the bolt by the magazine follower when the mag is empty.

The lever is part #43 on the parts diagram in the PC Carbine user manual, page 57, and is the "Last Round Catch".

Not sure of that is normal or not, but I am seeing the same wear on mine. I will check my other PC carbine when I get time.
 

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Discussion Starter · #4 ·
@RIBob Yeah I'm definitely keeping an eye on it from now on to see how it progresses. As Marvin suggested in the post above, the bolt is probably mashed up from hitting the last round catch. Unfortunately we don't get the legendary Ruger customer service in Canada. But I'll email Ruger's Canada service station to see what they think of this
 

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Discussion Starter · #5 ·
@Matthew23 - You made me look ;)

This is my bolt from my PC Carbine with about 2,500 rounds through it. The picture makes it look worse than it is in real life.

View attachment 173377

That notch is what the last round hold open lever catches:

View attachment 173378

View attachment 173379

View attachment 173380

That lever is pushed up when you assemble the receiver into the stock, and then pushed up to stop the bolt by the magazine follower when the mag is empty.

The lever is part #43 on the parts diagram in the PC Carbine user manual, page 57, and is the "Last Round Catch".

Not sure of that is normal or not, but I am seeing the same wear on mine. I will check my other PC carbine when I get time.
Ha interesting... It might be a "feature" if everyone has the same issue. I definitely expected the bolt to be much stronger than the last round catch though. 😅
 

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Different metallurgies. One piece has to sustain minimal force on occasion, the other (bolt) has to sustain maximum force each shot. Suggest NOT trying to pound the displaced metal back to its original position, that never works well. Instead use a very fine file to remove the displaced metal if it causes issues. Chamber pressure differences can make the differences in wear patterns - you pay for how you play.



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Here is my bolt from my PC Carbine that I have put 200 rounds through. I do not know the total through the gun since I got it used.

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Wood Metal Rectangle Art Fashion accessory


I measured the deformity and the first bolt I posted has .009 inches and the second has .004 inches.

Now that I am aware of this I will pay attention each time I take the guns apart. I have sent Ruger a question about this through their online support page contact form.
 

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One piece has to sustain minimal force on occasion, the other (bolt) has to sustain maximum force each shot.
The notch that is being deformed only contacts the Last Round Catch and then only when you fire until the mag is empty or pull the bolt back with an empty mag inserted, so it has zero force on it any other time.

I use my PC Carbines for Steel Challenge matches, that is 90% of my shooting. I very seldom shoot until a magazine is empty , so the bolt seldom locks open on an empty magazine.

I am not very concerned about this, yet. I will keep my eye on it though.
 

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Sent request tor Ruger CS via their web site on 8/1/22
Received email back on 8/2/22 with link to upload photos
Uploaded the photos 8/2/22

I used some of the same pics I have in my previous posts. I will update when they reply again.
 

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The notch that is being deformed only contacts the Last Round Catch and then only when you fire until the mag is empty or pull the bolt back with an empty mag inserted, so it has zero force on it any other time.…
I’m sorry, I wasn’t clear at all. What I meant was that the bolt sustains stress from each shot and cannot be too hard and brittle. That is why when it contacts the harder catch lever it is bound to be slightly deformed by the concentrated impact, as is visible in the bolt photos. This peening suggests that the concentrated force on the bolt at this point may be greater than some imagine.


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