Problem With Mk II

Z

ZipTieNinja

New member
I have a Mk II, Gov't Target model, and I keep getting jams. To be more specific, I keep geting failure to ejects. I was using Federal ammo, so I got some Remington ammo. I also thoroughly cleaned the entire gun, top to bottom. I have used a CLP, and Remington Rim Oil, no difference. I put 60 rds through it today, and rd #8, and 52 failed to eject, getting cought sidways by the bolt, rim out.

So what can I do? Is this normall? :confused:

As far as I know, the extracter is fine, but I can't be sure since I have nothing to compair it to. Any tests or checks I can make myself? Not sure the rd count for the gun, but it is right around 3000 now. Best I can tell, I don't know how to keep track of it since I have a .22 rifle as well. No more than 3000 rds though.

Any help would be great, I'm stumped.

Oh yes, the mags where cleaned good last night as well. ;)
 
A Volquartsen Exactedge extractor costs about ten bucks and is easy to install and I bet it'll fix your problem. I've put them in my MkII, 22/45, and 10/22 all of which had occasional stovepipe jams like the ones you're experiencing. Never happens nowadays. Before you spend any cash though, make sure that the extractor cutout in the breach face isn't clogged with gunk keeping the extractor from gripping the case rim.
 
Try to shoot Stingers. If no jams, then it's a recoil spring assembly that is a problem. Recoil spring is too strong. Had the same problem with MKII-4B. Cut 6 coils from recoil spring of
approx. 50 coils and it solved it. You can cut coils w/o disassembling the assembly...

If pistol still jams with Stingers, which produce pretty good recoil
impulse to carry bolt completely to the rear, then I don't know...
 
I thought the extractor might be it, but never thought of the spring. The extractor cutout is very clean. I use a nylon brush on it after I shoot to keep it from cloging. Is the one you metioned the titanium one that I see in Cabelas from time to time?

Is there an aftermarket recoil spring? I do not like the idea of cuting my spring if that is the cause. I could just get a new one from Ruger though. I thought that sense this was a target pistol that it was made with low powered sub-sonic ammo in mind. The spring does seem rather strong though.

Thanks for help, I will look into both possibilities. :cool:
 
FWIW, I don't recommend hacking the springs of your gun unless you really know what you're doing. It's pretty unlikely that Ruger screwed up that badly in the spring design, this is probably some other problem.
 
I had a govt target model that wouldn't eject. At first I thought it was the extractor, but after extracting a full mag of live rounds manually at the range, I ruled that out. Ruger had me send the gun in and they polished the chamber. That cured it. I kinda figured the chamber could be rough, cause when I sent it in, it still had an empty casing stuck in the chamber.

Pat Brophy
 
Ruger didn't screw up with spring design, but when I contacted
Ruger with my problem, they admitted that tolerance for spring
force is pretty wide, may be up to 40% total. Considering that
quality of the recently produced Ruger MKII is lower then it used to be several years ago, it can also be a burr in a chamber that
is the cause of a problem. In case of my MK-4B, it was a recoil spring assembly, as soon as I fixed it, jams stopped.

BTW, I compared compression force of spring assembly from my old Ruger Government Model (7 years old) and MK-4B, which I bought 2 years ago. There was like 50% difference, of course
Government Model spring assembly was used pretty good, still
seems like a lot of difference.
 
When you said that you cleaned the pistol, did you clean the magazines also? I know it seems a dumb question, but I have one that jammed constantly and found out that the lubricant on the bullets was gumming up the mags. The reason I mention this is that my jams were identical to yours.
 
I picked up a new gov. model last year. Had the same problem you are describing. Nipped off a half inch of the recoil spring and it runs like a champ.


markmcj
 
MK II

Hi,
I had the same thing going on in my .22/45, I had luck with the Winchester super X high velocity rounds. I have been told that when new standard velocity round are not enough to blow the bolt back all the way. IF you still have problems call Ruger.
Mark
 
Corey,
Yes, I cleaned both mags the night before. Complete disassembly and cleaning, with a light coat of oil as well. They are a little worn though, maybe a new one is in order.

Johnwill,
I agree, I will not hack a spring unless I already have a new one waiting. And then I would try it as-is first.



I used to clean this thing with a bronze bore brush after I finished shooting for the day. I don't now, not sense I heard that the brush does more damage than good. Don't think it could be a burr after all that scrubbing. At least not one that I could not see. Wonder if its been cleaned to death?! I will try to pick up some good ammo this Wed, if I remember to stop.....
 
One thing if this is a new gun, I'd shoot a few boxes of HV ammo through it to break it in before you spend too much time "fixing" it. That worked for me with my First MK-II.
 
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