Accuracy issues and keyholing? - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > > >

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 05-13-2021, 04:49 PM
RedShift556

Join Date: 
Apr 2021
Posts: 
8
TPC Rating: 
0% (0)
Accuracy issues and keyholing?



Log in to see fewer ads
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.
Reply With Quote
  #2  
Old 05-13-2021, 04:51 PM
Jammer22
NRA Member - Click Here To Join!

Join Date: 
Mar 2017
Location: 
Nowhere good
Posts: 
1,345
TPC Rating: 
0% (0)
ammo used?
__________________
"I am surrounded by fearful odds that will overcome me and my gallant men, but I am pleased to die fighting for my beloved country".
Reply With Quote
  #3  
Old 05-13-2021, 05:06 PM
RedShift556

Join Date: 
Apr 2021
Posts: 
8
TPC Rating: 
0% (0)
Quote:
Originally Posted by Jammer22 View Post
ammo used?
These groups are federal bulk. Same results with various CCI's, Remington Subs and thunderbolts.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 05-13-2021, 06:18 PM
zukiphile is online now
NRA Member - Click Here To Join!

Join Date: 
Jun 2002
Location: 
ohio
Posts: 
1,661
TPC Rating: 
100% (7)
Does the bore look clean?

I've gotten that twice in new MKIIs from lead accumulating in a new barrel.
Reply With Quote
  #5  
Old 05-13-2021, 07:06 PM
RedShift556

Join Date: 
Apr 2021
Posts: 
8
TPC Rating: 
0% (0)
Quote:
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.
Reply With Quote
  #6  
Old 05-13-2021, 07:08 PM
BadaBing11
NRA Member - Click Here To Join!

Join Date: 
Sep 2011
Location: 
US
Posts: 
799
TPC Rating: 
0% (0)
I had a 10/22 rifle do the keyholing . It was the magazine . Bullets were not feeding properly and getting damaged when being chambered
Reply With Quote
  #7  
Old 05-13-2021, 08:25 PM
RedShift556

Join Date: 
Apr 2021
Posts: 
8
TPC Rating: 
0% (0)
Quote:
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.
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.
Reply With Quote
  #8  
Old 05-13-2021, 10:33 PM
JStacy
NRA Member - Click Here To Join!

Join Date: 
Feb 2009
Location: 
Texas
Posts: 
4,816
TPC Rating: 
100% (31)
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.
Reply With Quote
  #9  
Old 05-13-2021, 11:48 PM
Racer X's Avatar
Racer X
NRA Member - Click Here To Join!

Join Date: 
Jul 2005
Location: 
Seattle
Posts: 
1,912
TPC Rating: 
98% (41)
Have you checked the crown for damage or poor machining?
Reply With Quote
  #10  
Old 05-14-2021, 12:14 AM
PEASHOOTER67's Avatar
PEASHOOTER67
NRA Member - Click Here To Join!

Join Date: 
Aug 2003
Location: 
North west of Ft. Worth
Posts: 
3,480
TPC Rating: 
0% (0)
Send a message via Yahoo to PEASHOOTER67
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"
Reply With Quote
  #11  
Old 05-16-2021, 09:09 PM
Rosscoe's Avatar
Rosscoe is online now
NRA Member - Click Here To Join!

Join Date: 
Jan 2008
Location: 
North Sacramento Valley
Posts: 
22,023
TPC Rating: 
100% (37)
Quote:
Originally Posted by JStacy View Post
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.
__________________
I'm an old blued steel and wood pusher. NMCA # 2047
Reply With Quote
  #12  
Old 05-25-2021, 11:13 AM
coltlog

Join Date: 
Dec 2016
Posts: 
263
TPC Rating: 
100% (1)
Keyholing is caused by there being insufficient spin on the bulletóand as there is pretty short list of possible causesófiguring 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.
Reply With Quote
  #13  
Old 05-25-2021, 01:18 PM
Test_Engineer

Join Date: 
Nov 2014
Location: 
On a Colorado glacier
Posts: 
2,874
TPC Rating: 
0% (0)
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.
Reply With Quote
  #14  
Old 05-26-2021, 06:19 PM
RedShift556

Join Date: 
Apr 2021
Posts: 
8
TPC Rating: 
0% (0)
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.
Reply With Quote
  #15  
Old 05-26-2021, 08:49 PM
AzShooter's Avatar
AzShooter
US Air Force Veteran NRA Member - Click Here To Join!

Join Date: 
Dec 2002
Location: 
Phoenix, Az
Posts: 
2,188
TPC Rating: 
0% (0)
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.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off




All times are GMT -5. The time now is 10:12 PM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©2000-2018 RimfireCentral.com
x