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Odd feeding issue with 22/45 MKII

This is a discussion on Odd feeding issue with 22/45 MKII within the Ruger Rimfires forums, part of the Pistol & Revolver Forum category; Hello one and all. Sorry if this has been posted before, but I recently picked up a used 22/45 as a plinker and have been ...


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Old September 6th, 2008, 10:19 AM   #1
 
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Odd feeding issue with 22/45 MKII

Hello one and all. Sorry if this has been posted before, but I recently picked up a used 22/45 as a plinker and have been experiencing an odd feeding problem. The second to last round always seems to fail to feed. The gun came with two mags and at first, I thought this was just a case of mag springs weakening. I acquired two new mags and it seems to be doing the same thing. Consistently, it feeds/fires just fine until it attempts to load the second to last round.

I've tried various brands of ammo and although some are better than others, they all seem to exhibit the same issue.

Just short of sending it back to the factory, has anyone got any ideas on how I can correct this problem myself. The gun did come with a ProPoint laser scope installed, but I can't imagine the added weight of the scope to be related to this problem. Thanks.



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Old September 6th, 2008, 11:18 AM   #2
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Brian48, First ... welcome to the forum! Oddly enough, the extractor has a big influence on feeding and sometimes shows up as a feeding problem even though the pistol extracts and ejects the case properly. Try changing the extractor and while you're at it, buy one of the VQ "Exact Edge" extractors that will also enhance extraction with all brands of ammo.
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Old September 6th, 2008, 01:11 PM   #3
 
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The extractor? OK, will give that a try then. At this point, I don't think there's anything wrong with the mags. Thanks.
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Old September 28th, 2008, 06:12 PM   #4
 
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OK, just to follow up on this post. I actually got the VQ extractor a few weeks ago and swapped out the factory one, but unfortunately work and family has prevented me from testing until today.

Unfortunately, the problem still persists. I suspected it would as the factory extractor still looked like it was in great shape. Even with the VQ extractor, the gun consistently failed to feed on the 9th round in the magazine. I experimented and tried to get it to fail with the 10th rd, but that worked fine. Each time, the FTF would necesitate having to remove the mag and clear the damaged rd from the chamber. This occurs with all four mags that I have.

It seemed really bad with CCI Blazers. CCI Mini-Mags were better, but still did it quite often. Same with Remington Thunderbolts. Remington Golden bullet was slightly better then the Thunderbolt counterpart, but couldn't go 2 (sometimes 3) mags without at least one failure. Winchester Xpert faired about the same as Remington Golden bullet. I ran at least 300+ rds with a MAX of 500 of each, cleaning the gun after each shoot. The only ammo that didn't seem to give me a problem was Winchester Super-X plated roundnose, but I only had one 50ct box laying around so that's probably not a valid test. I tested one mag full of CCI Stingers too which worked fine, but not the type of ammo that's suitable for this gun.

At this point, I really don't think it's the choice of ammo, but the gun itself. Anyone has any other ideas? Much appreciated.
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Old October 11th, 2008, 08:08 PM   #5
 
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Old October 12th, 2008, 06:48 AM   #6
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Very odd problem. I'm curios ... on the fail to feed, does the nose of the bullet jam up against the bottom of the feed ramp, or is it some other issue?
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Old October 13th, 2008, 07:30 AM   #7
 
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No, not a nosedive. If I had to describe it, it looks like it fed too "high", as if it was being stripped from the mag too soon or the nose somehow got "bumped up" during extraction.

The damage to the round would not be on the bullet itself, but on the case. Typical damage would be the bolt slamming into the mid-section of the case at an angle, severely denting/bending the round to the point where it can longer chamber. It's possible the round is popping out of the magazine too soon, but I'm not sure what could be causing it to consistency do this at the same point every time. Like I mentioned before, I bought two new magazines just in case the two older ones were worn out.
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Old October 13th, 2008, 08:40 AM   #8
 
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Here's one possible solution:
http://xavierthoughts.blogspot.com/2...ine-tweak.html

basically, the thought is that the round gets hung up on the notch in the magazine, so you make a small mod to the mag and all is well



Steve
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Old October 13th, 2008, 06:53 PM   #9
 
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Interesting. I guess I've got nothing to lose. I'll take one of the older mags and experiement then. Thanks.
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Old October 14th, 2008, 04:25 AM   #10
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Quote:
Originally Posted by Brian48 View Post
Interesting. I guess I've got nothing to lose. I'll take one of the older mags and experiement then. Thanks.
I guess the modification is worth a try, but it would seem that since your problem is occuring at the same point each time in all magizines, a fix like this would be unlikely to resolve the issue. I would be tempted to call Ruger service at this point. Let us know if it helps.
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Old October 21st, 2008, 07:44 AM   #11
 
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Just a quick follow-up. I haven't had time to test this yet at the range (hopefully this weekend), but I did modify one of the mags as best I could using the pics as a reference. I don't have a dremel, so I took a small honing stone and slowly worked the bevel in. If this works, I'll definitely invest in a dremel and take care of the other mags. Been looking for an excuse to get one for years. Now is as good of a time as any I suppose. Will post my results.
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Old October 25th, 2008, 12:08 PM   #12
 
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Unfortunately, it doesn't look like it solved the problem. I am still getting this annoying feeding issue. I took the modified mag with an unmodified to use as a control. There were no appreciable difference between the two. It may be because I did not make the bevel prominent enough. Anyway, I picked up dremel today and see if it makes the difference. Thanks.
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Old October 25th, 2008, 06:21 PM   #13
 
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Take it slow and easy with that dremel as you can take too much metal off in a hurry.

Been there, done that.

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Old November 4th, 2008, 08:07 AM   #14
 
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I would check the magazine well to see if there is some kind of obstruction interfering with the knob on the magazine. The common denominator is FTF on the ninth round, is it possible you are depressing the mag release after the eigth round? I found myself doing this on my KelTec P3AT.
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Old November 4th, 2008, 04:49 PM   #15
 
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Actually, I thought of that. I switched the knob around on one of the mags as a test. Made no difference.
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