Mark II Mods and Jamming Probs...

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lutherfetch
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Mark II Mods and Jamming Probs...

Post by lutherfetch » Sun Jan 20, 2008 4:24 pm

First let me thank this forum for the help. I thought I would give you an update on what I have done... First, I added a Volq sear, extractor, and Wilson sights.

FRom there, I created my own extended mag welding a tab to the original, filing it, and cold bluing it. I have since gone back and refined my metalwork since taking this pic, but you get the idea.
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Added an extended safety by drilling and tapping the original. Tried to drill out the screw head and welding it to the original, but the wire just arced to the screw head and not the button. Waste of time. When all is said and done, the tapping method was the way to go. The trickiest part was getting the drill to hit the dead center. It wanted to walk on me, even after center punching a guide spot. Three drill bits later, I got through. Had to drill all the way through for the tap to work. Trimmed the exra threads down, filled the bottom hole, and tacked them with a weld, filed flush and blued. Had to chase the indexing hole with a drill bit afterwards. I am happy with the results, and VERY happy with the way it shot for me yesterday. Much easier on the quickdraw. Great mod!

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The trigger job was done exactly as Bullseye posted previously. I went ahead and drilled and tapped between the hinge and the trigger. One hex screw later, and I was in business. Here is the only tip I would give you if you are going to try this... If you take a close look at the pic below, you will see a green super fine Sharpie line right where the trigger and the pistol come together. That is the exact point where there is no more pretravel. Once you pass that line, the gun fires. I found that having that reference kept me from having to put the gun together, test, and pull it apart 500 times to find the right spot. This made setting the trigger MUCH easier.

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YEsterday, I shot my best group ever wth these mods. I shot the first round of Practical. On both D-2's, I only had 3 flyers to the 5 zone. The rest were all in the 10 and X zone. I figure the flyers were from the offhand shooting. Still not too good at that.



Okay, here is the big question... I am still getting jams even after changing the extractor. Here is a pic below of what they look like. Now, this pic is not an actual jam from the range, but a recreation I did at home to get the pic. It looks pretty close.

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From what I can see, the ejector is not damaged, nor is it loose. I do wonder if it is short or if there is an angle, or something else causing this. Anyone have the OAL of a new ejector? Would like to mic it and see if it is short. The new extractor has made no difference. Neither does using different kinds of ammo. I get one jam about every 30-50 rounds... fine for plinking, but not okay when one is competing. Would love to have your insights into my jamming prob.

Thanks.

John

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lindertw
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Post by lindertw » Sun Jan 20, 2008 5:06 pm

sorry, I'm no help with the extractor problem - but I'm curious about your sights. Wilson, as in Wilson Combat? Any pics you could post?

Thanks!

*eta - great work on the mods! I like to see what other tinkerers are coming up with :)

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jjfunk
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Post by jjfunk » Sun Jan 20, 2008 6:21 pm

That looks like a short cycle. Maybe a new recoil spring?

JJ
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Post by Bullseye » Mon Jan 21, 2008 12:09 pm

Luther,

Take a look at this thread and see if this information helps. http://www.guntalk-online.com/forum/viewtopic.php?t=148

Another source of stovepipe jams is magazine positioning. If the mag is too high it can actually knock the spent casing off of the bolt face before the cartridge hits the ejector pin.

This article may help too. http://www.1bad69.com/ruger/stovepipe.htm

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lutherfetch
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Will check

Post by lutherfetch » Tue Jan 22, 2008 2:55 pm

Thanks for the replies... will go ahead and take a look at the links you sent me. Could very well be an issue with the mag. I have one that does it every time... but I have mic-ed the mag and can find nothing wrong with it. Not sure what it's deal is. I will do some reading from the posts you sent me and see what I can come up with.

As far as the sights go, they came from rimfire sports dot com.

Thanks.

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Sure Nuff!

Post by lutherfetch » Fri Jan 25, 2008 2:22 am

Wow, would not have guessed that to be a mag problem. Bullseye, went to those links you sent... rounded off the rear tab on the mag next to the extractor... problem gone. I have to say that I worked that action in slow-mo a number of times and it did not touch that mag... but then again, I only had a problem once or twice every 50 rounds. Put about that all through the mag I had tagged as the most problematic. No jams tonight. Finally have a trustworthy nail driver in that little Mark 2. Thanks for all the great help. Really happy with this pistol.

Oh yeah, those Wilson sights I mentioned... Those are Williams sights. Sorry. I went to public school.

John

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Post by Bullseye » Sat Jan 26, 2008 12:35 pm

That is good news. Sometimes its the little things that make the difference, especially in our assembly line manufacturing society. The assembly specs vary enough that two parts may be within their individual tolerances but together they are far enough apart to malfunction intermittently.

If you start to develop jams again I'd replace the extractor claw with one from Volquartsen. The Exact Edge Extractor is harder and sharper than the factory OEM one. The factory ones tend to wear with use but I've never had to replace a VQ extractor for wear after installing one.

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lutherfetch
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MArk 2

Post by lutherfetch » Sun Jan 27, 2008 11:27 pm

First thing I did to fix the problem was put in the VQ extractor. (put 1 in my 10/22 years ago). Didn't help this time. The problem was the mag. Rounded off the other 4 mags yesterday. All problems gone. If anyone is going to try this, here is my advice...

You really don't need to take off very much. I took off too much on my first mag, and sometimes the first round sticks up at a wierd angle. Its ok. The mag was useless until I did the mod any way. Just take enough off to round the sharp tab off next to the extractor. That's it. Problem fixed. I used a Dremel Tool, but a simple file would do the trick.

I put 100 rounds through the 5 mags as fast as I could pull the trigger Sat and did not have a single malfunction. I am really happy with the results.

John

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