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MkIII fail to load and trigger issues

This is a discussion on MkIII fail to load and trigger issues within the Ruger Rimfires forums, part of the Pistol & Revolver Forum category; Back again for you sage advice...after about 10K rnds thur the MK III target model I am having feed issues about 1 out of 40 ...


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Old November 24th, 2019, 02:18 PM   #1
 
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MkIII fail to load and trigger issues

Back again for you sage advice...after about 10K rnds thur the MK III target model I am having feed issues about 1 out of 40 rnds. I use only two mags at the range, both factory and have not paid attention to which magazine, if either, the problem exists. What happens is that within the first 4 cartridges fired the bullet jams up on the top of the breach. This causes stovepipes and other hang-ups ejecting the spent casing. It has never happened towards the end of a full magazine, seemingly only in the middle. Furthermore, the trigger seems different in that when charging the gun I sometimes must reset the trigger in order to make it "live". I hope I am using the proper terms here, but its the best description I have. Looking for advice/help....THX



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Old November 25th, 2019, 12:22 AM   #2
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Have you tried stripping and cleaning it really well? Some kinds of .22's tend to be very dirty and leave a lot of residues. Do you clean the lower as well or just the barrel assembly?
Apart from that: Maybe you know someone with a MK III so you could try their magazine to see if your problem could be a magazine issue? Also, have you checked the extractor? If residues are not the problem than maybe you've got a broken trigger return spring?
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Old November 25th, 2019, 02:41 AM   #3
 
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have you tried stripping and cleaning it really well? Some kinds of .22's tend to be very dirty and leave a lot of residues. Do you clean the lower as well or just the barrel assembly?
Apart from that: Maybe you know someone with a mk iii so you could try their magazine to see if your problem could be a magazine issue? Also, have you checked the extractor? If residues are not the problem than maybe you've got a broken trigger return spring?
+1 ^^^ good advice ^^^
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Old November 26th, 2019, 08:09 PM   #4
 
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I clean this like I mean it meaning that I clean the lower all the time, I also have cleaned the magazines themselves......between my last post and now, I got advice to replace magazine springs and recoil spring.
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Old November 27th, 2019, 02:45 PM   #5
 
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Originally Posted by Blustery View Post
I clean this like I mean it meaning that I clean the lower all the time, I also have cleaned the magazines themselves......between my last post and now, I got advice to replace magazine springs and recoil spring.
I would just buy another magazine to see if that is the problem or not. You can always use extra mags anyway. With only 10000 rounds through the gun I wouldn't think the recoil spring would be bad but anything is possible.

Do you have a pretravel or overtravel screw on the trigger? If so sometimes they need readjusted if the trigger does not reset.

Last edited by bubba68; November 27th, 2019 at 02:48 PM. Reason: question
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Old November 27th, 2019, 03:57 PM   #6
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Blustery, When you experience 1 failure in 40, it tells me it may not be the gun …. it could be the ammo. When failure rates are like 1 in 10, it's more likely to be a gun issue …. maybe the magazine but the biggest issue with any semi auto is actually the bolt face. It has to be clean and smooth because the case head has to slide up on the bolt face to get positioned to chamber. If anything causes the case head to gag on the bolt face, it will result in a jam. This includes the extractor too …. the case rim has to position under the extractor's claw or the cartridge will gag and jam.
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Old November 28th, 2019, 10:12 AM   #7
 
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I clean this like I mean it meaning that I clean the lower all the time, I also have cleaned the magazines themselves......between my last post and now, I got advice to replace magazine springs and recoil spring.
I don't think your problems have anything to do with mag springs, recoil springs, mags, or ammo. You had no problems for thousands of rounds, and now you've reached 10k and occasional problems have started. It's time for some maintenance.

First, I'll assume you have put in a VQ trigger. If you used the return spring VQ supplied, it has probably weakened enough to cause your reset problem. It's thinner than the Ruger spring and doesn't hold up well enough. Put the Ruger spring back in. If you're already using the Ruger spring, you may need to back the pretravel screw out about 1/4 turn. Also, if you're using a VQ disconnector, you may need to add a small shim to keep the front end held out against the right side of the frame. In my experience, all 3 of these things can/will cause reset glitches. Easy fixes though.

As for your feed/ejection problems, I think it's time for a new extractor. I know some people have claimed to use the original extractor for many years with no problem. But I find that all extractors wear out over time (at least in my pistols) and need replaced periodically.

Here's a pic of the first VQ extractor (on the right) I put in my MKIII after 13k rounds:



It was marginal by this time (like yours is now), and was worthless by 15k. I now pull my extractor out every 2k rounds, file off the galling, reinstall, and check for quality of function. It typically gets replaced every 10k rounds - just before function degrades to the the point of failures. Following this practice has prevented any feed/eject issues in my MKIII for nearly 30k rounds.

As a side note, I did have one VQ extractor's hook break off after only 3k rounds. They replaced it free of charge, but I now always carry a spare in my range bag. It sucks to have to leave the range early because a $10 part quit working.

BTW- the lines in the pic were showing severity and direction of the galling in an earlier post I made.
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