My Ruger Mk2 keeps choking.

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billybob

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It's usually the 2nd, 3rd, or 4th round. With either mag.

It fails to eject the spent round and turns it sideways on top of the new round and jams on it. Only way to clear is to fumble the mag out (it's the old style with heel release) and then pull out the empty and if the live one is positioned right, go ahead and chamber and fire.

I took it down and saw some rough spots on the bolt (just rubby points) and stoned them smooth. The feed ramp was OK but there were some TINY ridgies so I polished it smooth. There was some wear sign on the bolt stop and so I stoned that too just in case it was rough and maybe dragging on the bolt.

I even polished the spring guide rod in case THAT might be a hangup.

It's worse with Rem bulk pak and I have had good luck (not in this gun though) with the Chinamart Winchester bulk Xpert HP.

I have some CCI Std Vel and I am going to get a box each of MiniMag and (ugh) ....Federal.

I have had so many FTFs with Federal in EVERY gun that I hope it doesn't work. But I'm going to explore that maybe some slight variance in dimensions of rim might be the culprit.

The extractor looks nice and sharp and properly slightly angled back as it should be. The gun is fairly new. The ejector looks fine.

Oh yeah. When I reassembled, I put a light film of grease on the guide rod, the sear, and the hammer face. And still that sideways jam.

And it's the 4" bull bbl. Mk2
blued if it matters.
I can't think of anything else to describe

Any OTHER suggestions?

:confused:
 
I was having the same problem the other day with my Mark 2. I was shooting Federal plated HP's. I switched back to Mini Mags and the problem went away.

My Mark 2 is about two years old but hasn't seen a lot of range time. I'm guessing the ammo was a bit on the weak side and the bolt is not as smooth as it could be and the action was short stroking.

Also my extractor edge isn't real sharp, maybe it's not drawing some brass cleanly out of the chamber. Thinking of adding a VQ sear anyway, maybe I'll upgrade the extractor too.
 
P.S.
Maybe the grease is slowing down your action. Rimfire autos don't have a lot of recoil to operate with and usually work best with very light synthetic oil. I use FP-10 and I get good reliability with Mini Mags even in sub-zero weather.

Also the magazines have to be very clean. Any waxy residue where the bullet noses rub the front of the magazines will make a pistol choke. Even though your problems may not sound mag related, you never know with Mark 2's.
 
Also for the heck of it make certain that the chamber is clean and smooth. Check some of the spent brass and see if there are any scratches on it to show that its dragging on the way out. There is probably not but you never know.

I will agree with the grease. That will slow things down some.

Its gotta be something simple, there are too many of those pistols out there that never have a problem for you to have one that does.

Good luck and keep up posted on what you find.
 
Going to try several ammos. The grease is LIGHT.... light light light.
Just a smear. No globbing. Light recoil sounds about right.

But as I recall, it digests the CCI std vel just fine, but not sure as it's been a while.

I've never shot mini mags. MIght start.

Sure gonna TRY em.
 
How new is your Ruger Mark 2? It took me approximately 1000 rounds for my Ruger 22/45 to work reliably with bulk ammo. You might try CCI stingers. They are hotter.
 
If you want to shoot the cheap ammo in your Ruger, investing $10 in the Volquartson "exact edge" extractor will be very worthwhile. I mic'd a bunch of stovepipe prone ammo brands vs. ones that didn't and found the stovepipe prone rounds had visibly thinner rims and the edge diameter was typically 0.0005" smaller.

Don't seem like much but the Volquartson extractor reduced the stovepipe rate below the dud rate on the Federal copper plated bulk pack for me in multiple guns.

Also, make sure you are not "cupping" the gun with your hold as upward pressure on the magazine while shooting can also interfere with ejection.

--wally.
 
Once again, hold off on the grease. A .22 auto isn't going to be working so hard that it needs anything heavier than a light coat of oil to make things happy, and the grease is sure to pick up a ton of fouling from those dirty .22's and hold it right against the action.

And maybe it's just me, but I personally wouldn't have taken any material off of any of the parts until I had done some pretty extensive testing with as many various types and brands of ammo as possible. Taking material off should (in my opinion) be a last resort. You can replace a worn spring (which could easily cause FTRTB issues) but it's tough to put that metal you ground off back on. Even if it is a little bit, sometimes that's just too much.

Sorry I don't have very much constructive to say - just thought that I'd put my two cents in. Hope your issues get resolved, one way or the other. I'm curious to hear what the final result is.
 
The aftermarket extractor is a good idea, and an easy upgrade. But just on a hunch look at the chamber in the area where the firing pin impacts the rim of the case and see if there could be a burr there, it could be holding on to the case a little to hard.
 
I have a Ruger 22/45 and my dad has a Browning Buckmark. I bought some cheap brand of .22 ammo and it was very weak. Both pistols wouldn't cycle the ammo? I had some CCI in my glove box and no more problems. The mini-mags are the hottest, but most expensive (still millions of dollars cheaper than .223 ammo right now).
 
Progress (?) report

OK. While looking at the gun, I noticed that the recoil spring guide (the half moonie looking thing) was very rough cast. So I took my DMT diamond stone and stoned the thing until it was smooth and had no valleys and ridges as it came from the factory.

VOILA!

for about 50 rounds.

phooo!

Then it started again.

Two of the boxes of new ammo I tried were Federal "Game-Shok" and "American Eagle." The Game Shok wouldn't get through 3 rounds. Jam on each. They wouldn't even blow the slide back enough to open it to full open. Still got 47 of em left to plink thru my 9422. The American Eagle was a ...little.... better. But still came to the conclusion as I have EVERY other time I have used FEDERAL popgun ammo. I think Federal is a Feinstein company.

Anyhow. CCI won out. CCI ....standard velocity.... worked completely. The mini mags ...pretty good but still a hang on the last mag I did.

After getting home, I looked at RecoilRob's post and took it down again and checked. I can't see the rim hitting ANY part of the mag before the ejector.

BUT.....

With the bolt out and just sticking rims in, it appears that the extractor does not have a very GOOD grip on the rim.

So.....next item will be the extractor and I bet that will do it.


:scrutiny::confused:
 
Did you..

...

Take the magazines apart and clean them? Make sure the follower is smooth, no burs, if plastic, and leave no film, of *oil within the mag interior walls? Last, if you did, or you haven't cleaned out the mags and the followers, make sure the mag spring is in right..

*EEZOX or CLP is great for cleaning mags, especially the EEZOX, as it leaves a bonded coating, once you clean them with the stuff, and give it a final swipe, and it bonds to the metal without attracting dust, powder, etc., same for the feed ramp.. makes metal to metal contact slippery. *Directions on can.. and ok to use on plastic.

It sounds like a mag feed problem..


Ls
 
The Ruger .22 autoloaders can be very naughty at times. You really have to keep them extra clean and they still act up. My Jennings .22 is actually more reliable than my Ruger. Not as accurate though.
 
I used to have such problems with my Colt Woodsman,my Rugers Mk1 and Mk2,my Stoeger Luger and my Browning Buckmark. Extremely LIGHT lubrication and CC mini-mags cured them all! I don't buy bulk .22s anymore.
 
Oil pistols and grease rifles.

Clean the gun and oil lightly. Too much oil keeps the powder fouling in the parts, grease would be worse. Get some good ammo, cci is one of the best and Hi velocity (not hyper) will provide more robust funcitoning than standard though standard velocity should work fine.

There is kind of a standing joke about Ruger jams at our .22 handgun league as its quite common when they get a little dirty.
 
If you want to shoot the cheap ammo in your Ruger, investing $10 in the Volquartson "exact edge" extractor will be very worthwhile. I mic'd a bunch of stovepipe prone ammo brands vs. ones that didn't and found the stovepipe prone rounds had visibly thinner rims and the edge diameter was typically 0.0005" smaller.

Don't seem like much but the Volquartson extractor reduced the stovepipe rate below the dud rate on the Federal copper plated bulk pack for me in multiple guns.

Also, make sure you are not "cupping" the gun with your hold as upward pressure on the magazine while shooting can also interfere with ejection.
Click to expand...

This worked for me:)
Light oil on the action parts
clean the chamber really good
*Volquartsen extractor*
 
And this folks is why I switched to .22 revolvers - I can shoot any ammo no problem. The only ammo I found that was 99.9% reliable in my Ruger or Buckmark was CCI Minimags...
 
There is kind of a standing joke about Ruger jams at our .22 handgun league as its quite common when they get a little dirty.
Click to expand...

Guess I got lucky. My three Ruger MK II have been operating 100% reliably for the sixteen years I have owned them, even when they are dirty.
 
CLP only, no grease on mine. The MKII is picky when it comes to ammo. Try a bunch of different brands until you find one that yours like. CCI usually works best for most folks.
 
I haven't swapped to the Volquartzen (sp?) extractor, but a couple of my Shooting Budds have for their various MKI, MKII's.

One budd had a very ahhhhh 'persnickety' MKII. ....would NOT work with anything but the CCI 'Stingers'. The <$10 Volquartzen, and using oil instead of grease...now eats ANYTHING.
 
Last edited:
Sometimes the simplest solution is the hardest to grasp.
Clean yer mags!!
This happened to me with my MK-IIs (I have four of them).
I went nutz for weeks, then some old dude at the range saw me struggling and asked that fateful question!!
I went home, cleaned the mags, and the problem went away!!
I also was having the same problem with my P5.
Cleaning the mags also solved that little problem!!
 
I had an ejection problem with a MKII. The magazine ended up being the cause. Either the gun or the magazine is out of spec. Basically, the mag was loose and could rid up and knock the empty out of the bolt face during ejection. Some judicious filing on the magazine lips cure that.

Actually it did it with the both magazines, so I suspect something on the gun was out of spec.
 
I ....cleaned.... the mags. I did EVERYTHING. I even took the thing apart and REMOVED the light coat of grease and ran it DRY.

Other than smelting it and re-alloying and casting a new gun, I tried everything.

I now have an extractor on the way.

Let's hope this does it. At least....I.... will hope so.

What I am at a loss to explain is how the CCI std vel works and the minimags don't.

Oh well.

I await the MAGIC EXTRACTOR!!!!!

Then it's BELT FEED!!!
 
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