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  #1  
Old 05-13-2021, 04:49 PM
RedShift556

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Accuracy issues and keyholing?



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I bought this 22/45 back in 2012 with the intention to suppress it. Pretty much out of the box I was disappointed with it. Poor accuracy and what to me seemed to be slight keyholing. I tried a bunch of different ammo and several deep cleanings of the bore and nothing worked. I sent it back to Ruger in maybe early 2013 and they sent it right back saying everything was fine. After that, I put it in the back of my safe and forgot about it.

Well almost 10 years later I've gotten bitten by the .22 bug again and decided to figure this out with the hopes of finally suppressing it. I put 40rds through it today and sure enough poor groups and what looks like a bit of keyholing.

These groups are from 7ish yards. Center group was more of a just finish the mag type of group but you can see the keyholing well in that group. Regardless, the other groups and terrible when compared to the several other Ruger MKII and MKIII's I've shot. This one just seems to pattern with very little consistency.


Last edited by RedShift556; 05-13-2021 at 04:57 PM.
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  #2  
Old 05-13-2021, 04:51 PM
Jammer22
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ammo used?
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  #3  
Old 05-13-2021, 05:06 PM
RedShift556

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ammo used?
These groups are federal bulk. Same results with various CCI's, Remington Subs and thunderbolts.
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  #4  
Old 05-13-2021, 06:18 PM
zukiphile
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Does the bore look clean?

I've gotten that twice in new MKIIs from lead accumulating in a new barrel.
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  #5  
Old 05-13-2021, 07:08 PM
BadaBing11
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I had a 10/22 rifle do the keyholing . It was the magazine . Bullets were not feeding properly and getting damaged when being chambered
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Old 05-13-2021, 08:25 PM
RedShift556

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Does the bore look clean?

I've gotten that twice in new MKIIs from lead accumulating in a new barrel.
Gave it another scrubbing followed by some bore compound. The bore definitely wasn't dirty by any means and I don't see any lead build up. Lands and grooves look distinct, and the throat looks clean.

Badabing11,

Good suggestion, just checked out that possibility and it doesn't appear to be the issue with this pistol.
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Old 05-13-2021, 10:33 PM
JStacy
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Shoot it at 20 yards or so and if the bullets are going to keyhole they should at that distance. Take pictures of the target and send that along with the guns serial number to Ruger and ask for help.
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Old 05-13-2021, 07:06 PM
RedShift556

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Originally Posted by zukiphile View Post
Does the bore look clean?

I've gotten that twice in new MKIIs from lead accumulating in a new barrel.
Hmm, the round count is probably around 500rds with several thorough cleanings to test this theory.

The bore looks fine, but perhaps I'll try some JB bore paste to clean out any lead that brushes wouldn't have gotten.
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  #9  
Old 05-14-2021, 12:14 AM
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Scope the barrel.

My bet is there is a bunch lead in the barrel


"The biggest communication problem is we don't listen to understand, we listen to reply"
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Old 05-26-2021, 06:19 PM
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Bit of an update, I think you guys may have been onto something with the crown. It had some suspect looking machining marks that I guess are called chattering. Didn't take any pics but I wound up finding this:

https://www.ar15.com/forums/handguns...me_/50-128225/

A guy from 2012 with the same problem, same model, from the exact same time period I bought this MKIII. Looks like the targets he posted also show some slight keyholing.

Anyways, after seeing the chatter marks and coming across that thread I called Ruger and sent it back again.
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  #11  
Old 05-26-2021, 08:49 PM
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Glad you were able to find a solution. I guessed the crown as well. I'm sure Ruger will take care of you.

When you get it back get some good ammo to test again. All my guns love CCI Blazers and shoot them better than the expensive stuff. If it doesn't shoot Mini Mags well there's something wrong with it.

Anxious to see pictures of the gun and your targets when you get it back.

Good luck and good shooting


Steven

Last edited by AzShooter; 05-26-2021 at 09:45 PM. Reason: never finished my thought.
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  #12  
Old 06-05-2021, 10:03 PM
RedShift556

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UPDATE:

Well, I got a ship notification from Ruger so I gave them a call to see what their fix was. I was told once again that they couldn't replicate the issue with their ammo, and it was on it's way back to me. I told them about the thread from AR15.com and said I wanted to email the link to the tech that worked on my pistol, but the CS rep said that she'd escalate it to her supervisor instead and gave me her email address so she could forward it.

So I typed out an email explaining the situation, and the link to the thread that documents another 2012 MKIII 22/45 having the exact same issues. Got the pistol in the mail a couple of days later sadly, but I shot another email to the CS rep and heard back that her supervisor was looking into it.

A few minutes later I got a phone call and was told that they're sending me another RMA and shipping label to send the pistol back, and that I'll be getting a new MKIV Tactical to replace it.

Super happy, I had already been eyeing the MKIV tactical and really liked the aluminum frame and new features. I handled a MKIV standard at a local gun store today and really dug the grip angle and fit and finish. It felt way better in my hand that my old MKIII 22/45, so I know I'm going to love the replacement.
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