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Rimfire Firearms .22, .17 and other Rimfire Handguns and Rifles

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  #1  
Old 07-17-2019, 7:41 PM
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Default Ruger MKII - Barrel Damage

Wife received a MKII from her father that hasn't been fired in years, was pretty dirty, and has seen better days. It also had a broken bolt stop pin.

I ordered a new pin, completely stripped the firearm, gave a deep cleaning, put the new bolt stop pin in, and put it back together.

Everything was operating (dry fire) smoothly.

Put some snap caps into a magazine to check cycling operation and the rounds wouldn't chamber.

Turns out there is a burr/damage to the inside of the barrell above The feed rail that bullet heads get caught on and it disallows full chambering.

Is there a way to fix this? Can a gunsmith correct or smooth the barrell so the firearm will feed properly? Or should I just buy a new barrell for it?
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  #2  
Old 07-17-2019, 8:20 PM
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Is the defect located where the firing pin is?
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  #3  
Old 07-17-2019, 8:52 PM
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(1) Need picture where the burr is .

(2) >> Turns out there is a burr/damage to the inside of the barrell above The feed rail that bullet heads get caught on and it disallows full chambering. <<

use .22 mop with .177 cleaning rod (refer aluminum rod) polish the suspect area.
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  #4  
Old 07-17-2019, 9:26 PM
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It sounds like an issue that can be corrected. Please post a pic of the affected area so all can evaluate. At best, the bur/roughness can be polished out by you. At worst, if it can’t be polished out a chamber “finish” reamer could be used. Simple job for a gunsmith who has the reamer. But you could do it if you’d want to invest in 1-time tool. Brownells has them. Good luck!
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  #5  
Old 07-17-2019, 9:42 PM
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Quote:
Originally Posted by Fjold View Post
Is the defect located where the firing pin is?
Peening was my first thought, but i cant remember where the firing pin is on MK series.
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Old 07-17-2019, 10:29 PM
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Right on top..

Op how much dry firing did you do?
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  #7  
Old 08-09-2019, 2:11 PM
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Firing pin impact damage is what I'm thinking, too (without seeing a picture). This is why you never dry-fire a rimfire rifle. Use a spent casing if you don't have a snap cap. It (if this is the case) can be deburred.
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  #8  
Old 08-09-2019, 2:44 PM
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The firing pin stop pin in the bolt may be broken or missing, firing pin should not be hitting the breech. The dings can be easily corrected with a chamber iron, any professional gunsmith should have one, as do many of us lay gunsmiths. Your location?
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  #9  
Old 08-09-2019, 5:35 PM
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Quote:
Originally Posted by Aces and 8s View Post
Wife received a MKII from her father that hasn't been fired in years, was pretty dirty, and has seen better days. It also had a broken bolt stop pin.

I ordered a new pin, completely stripped the firearm, gave a deep cleaning, put the new bolt stop pin in, and put it back together.

Everything was operating (dry fire) smoothly.

Put some snap caps into a magazine to check cycling operation and the rounds wouldn't chamber.

Turns out there is a burr/damage to the inside of the barrell above The feed rail that bullet heads get caught on and it disallows full chambering.

Is there a way to fix this? Can a gunsmith correct or smooth the barrell so the firearm will feed properly? Or should I just buy a new barrell for it?
Call RUGER C/S. get a shipping label (gratis), but it in a box, and send it back to the Mother Ship.




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  #10  
Old 08-09-2019, 5:37 PM
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Right. Send it to Ruger for repairs.
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  #11  
Old 08-13-2019, 4:01 PM
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Quote:
Originally Posted by Aces and 8s View Post
Wife received a MKII from her father that hasn't been fired in years, was pretty dirty, and has seen better days. It also had a broken bolt stop pin.

I ordered a new pin, completely stripped the firearm, gave a deep cleaning, put the new bolt stop pin in, and put it back together.

Everything was operating (dry fire) smoothly.

Put some snap caps into a magazine to check cycling operation and the rounds wouldn't chamber.

Turns out there is a burr/damage to the inside of the barrell above The feed rail that bullet heads get caught on and it disallows full chambering.

Is there a way to fix this? Can a gunsmith correct or smooth the barrell so the firearm will feed properly? Or should I just buy a new barrell for it?
Don’t remove any metal. Get a swager and push the metal back in place. Happened to me last year and we’re still going strong
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Old 08-13-2019, 4:17 PM
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I've pushed these dents back with the shaft of a tapered punch.
You want as gentle a taper as you can that will fit into the chamber far enough.
On the Ruger, the barrel is the serial numbered part so if Ruger says the barrel has to be replaced and they can't stamp your current serial number on the new barrel you may be looking at a DROS-it-again situation.
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Old 08-13-2019, 4:32 PM
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Quote:
Originally Posted by cmichini View Post
Don’t remove any metal. Get a swager and push the metal back in place. Happened to me last year and we’re still going strong

THIS....

https://www.rimfirecentral.com/forum....php?t=1080098
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Old 08-13-2019, 4:38 PM
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Quote:
Originally Posted by ojisan View Post
I've pushed these dents back with the shaft of a tapered punch.
You want as gentle a taper as you can that will fit into the chamber far enough.
On the Ruger, the barrel is the serial numbered part so if Ruger says the barrel has to be replaced and they can't stamp your current serial number on the new barrel you may be looking at a DROS-it-again situation.
Since the MkII is out of production it may not be as simple as a new barreled receiver. That is a big downside to the Ruger Mk pistols; the barrel is not replaceable since it is part of the serialized receiver. If the chamber can't be repaired then I don't see any available options.
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Old 08-18-2019, 7:37 PM
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http://castboolits.gunloads.com/show...rel-Ruger-MKII
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