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-   -   Accuracy issues and keyholing? (https://www.rimfirecentral.com/forums/showthread.php?t=1223339)

RedShift556 05-13-2021 04:49 PM

Accuracy issues and keyholing?
 
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.

https://i.imgur.com/wK9eUcvl.jpg

Jammer22 05-13-2021 04:51 PM

ammo used?

RedShift556 05-13-2021 05:06 PM

Quote:

Originally Posted by Jammer22 (Post 12315857)
ammo used?

These groups are federal bulk. Same results with various CCI's, Remington Subs and thunderbolts.

zukiphile 05-13-2021 06:18 PM

Does the bore look clean?

I've gotten that twice in new MKIIs from lead accumulating in a new barrel.

RedShift556 05-13-2021 07:06 PM

Quote:

Originally Posted by zukiphile (Post 12315929)
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.

BadaBing11 05-13-2021 07:08 PM

I had a 10/22 rifle do the keyholing . It was the magazine . Bullets were not feeding properly and getting damaged when being chambered

RedShift556 05-13-2021 08:25 PM

Quote:

Originally Posted by zukiphile (Post 12315929)
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.

JStacy 05-13-2021 10:33 PM

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.

Racer X 05-13-2021 11:48 PM

Have you checked the crown for damage or poor machining?

PEASHOOTER67 05-14-2021 12:14 AM

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"

Rosscoe 05-16-2021 09:09 PM

Quote:

Originally Posted by JStacy (Post 12316147)
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.

Yep! you'll get better keyholes farther out, not that you want this.........!

If its keyholing, something is very wrong.

coltlog 05-25-2021 11:13 AM

Keyholing is caused by there being insufficient spin on the bullet—and as there is pretty short list of possible causes—figuring out the problem should be fairly easy.

You''ve eliminated worn lands and lead build-up, so about all that leaves is a defective crown. Pay attention to Racer X's suggestion,and check for deformations left by poor machining or mechanical abuse.

Test_Engineer 05-25-2021 01:18 PM

Yep, defective crown is the most likely culprit. But I've also read reports of problems caused by poorly formed thread protectors.

It might also be worth slugging the barrel. Gently pry a bullet from a round by rocking it back and forth. Then push it thru the bore with a jag from the chamber end. Use a rod that can rotate in the handle and watch the rod. It should have equal resistance and spin the entire bore length. Inspect the slugged bullet for even rifling depth as well.

Something is bound to be revealed between these two checks.

RedShift556 05-26-2021 06:19 PM

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.

AzShooter 05-26-2021 08:49 PM

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

RedShift556 06-05-2021 10:03 PM

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.:bthumb:


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