Ruger Mark IV

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Ruger Mark IV

Post by cdrt on Fri Sep 23, 2016 10:38 pm

First topic message reminder :

https://www.youtube.com/watch?v=OAteY5RFEoI

Finally!!!


Last edited by cdrt on Fri Sep 23, 2016 11:48 pm; edited 1 time in total

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Re: Ruger Mark IV

Post by BE Mike on Wed Oct 12, 2016 8:53 am

Thanks for the post JimVon. It's crazy that the worst ammo is the only one that cycles reliably. Rugers have always had bad triggers. My first bullseye pistol was a Ruger MK I with 5 1/2" bull barrel. It was always super accurate and reliable. My second bullseye pistol was a High Standard Citation. It was everything that a good bullseye pistol should be straight out-of-the-box. Except for your reliability issues with your MK IV, everything seems to be good to go. What kind of malfunctions are you getting?

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Re: Ruger Mark IV

Post by JimVon on Wed Oct 12, 2016 2:27 pm

Mike,
The malfunctions that I'm getting are almost all related to failure of the action completely cycle.  The bolt does not run its full course and slams back home before the spent case has a chance to eject.  Sometimes, I will get a stove pipe.  
I'm going to give it a real good cleaning and see what happens.  I know that I should have cleaned it before shooting, but I striped it down and everything looked pretty good, so I didn't do to initially.  I'm wondering if a good cleaning and some more rounds runt through it might fix the problem.  It just seems just a tad tight.
I will follow up with what i find out.
Here is a question about triggers - I know that Volquartsen is working on a trigger for this pistol.  Are they good triggers, or is there something better out there in the Bullseye community.  For example - In Highpower, Geissele is kind of the go-to trigger.  What do you guys use?

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Re: Ruger Mark IV

Post by desben on Wed Oct 12, 2016 3:00 pm

Jim, it's possible the pistol needs to "break in". Run a brick of high-velocity ammo through it, clean it again and then try standard velocity again. Cycling the action a few hundred times will smooth out the little surface imperfection. My Ruger (Mk III) digests most standard velocity without issues; CCI Standard Vel, Remington Subsonic, SK Standard Plus, RWS, Eley, etc.  Federal standard velocity gave me and a lot of other guns some issues.


As for the trigger, Volquartsen is the only one I'm aware of for a drop-in kit. I have their trigger and sear in my pistol; I think they also make a hammer. It's not a great trigger, but it's certainly better than stock. Another option is to send your gun to a bullseye gunsmith and have him do his magic on the stock parts.


Last edited by desben on Wed Oct 12, 2016 3:02 pm; edited 1 time in total (Reason for editing : (forgot an "s"))

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Re: Ruger Mark IV

Post by Allen Barnett on Wed Oct 12, 2016 4:46 pm

Don't waste your time with Volquartsen.  I had one of their complete high dollar lowers and the trigger/sear was worn out with less than 5000 rounds through it. Trigger pull dropped to only 1.5 pounds. Sent it to Volquartsen they said sorry.  My recommendation would be to make contact with Jon Eulette, high master member and gunsmith who is on this forum.  Or send to Clark Custom for a trigger job.  Clark has been building Ruger's since there were Ruger pistols.

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Re: Ruger Mark IV

Post by marlin1881 on Fri Oct 21, 2016 2:00 pm

Here is an easy fix to remove the mag disconnect safety.  Helps with trigger pull, too, from a poundage standpoint.  Doesn't do anything for pre-travel, over-travel, or sear engagement.  There are many custom parts available on this site, specific to the Ruger 22 pistols.

https://www.tandemkross.com/Steel-Hammer-Bushing-for-Mark-III-and-2245-Pistols_p_9.html

This bushing now allows the mags to drop free.  This was a big deal for me.

I did my own trigger work on the factory parts on my MK3 22/45.  The sear polished fine, and the hammer hook does kinda OK, but mine was very rough from the factory.  Had to drill/tap trigger for both pre/over travel.  I put in a Wolff trigger spring to reduce some poundage.

It turned out OK, and mine now trips at 2-3/4lbs as per RCBS gauge.  I maintain 0.020" sear engagement.

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Re: Ruger Mark IV

Post by LenV on Fri Oct 21, 2016 5:10 pm

Gota ask. Are the internals the same for the Mk3 and Mk4? I don't know if the fixes for a 3 work on a 4. I would suspect they are a totally different animal but could be wrong.

Len

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Re: Ruger Mark IV

Post by BE Mike on Fri Oct 21, 2016 5:31 pm

JimVon wrote:Mike,
The malfunctions that I'm getting are almost all related to failure of the action completely cycle.  The bolt does not run its full course and slams back home before the spent case has a chance to eject.  Sometimes, I will get a stove pipe.  
I'm going to give it a real good cleaning and see what happens.  I know that I should have cleaned it before shooting, but I striped it down and everything looked pretty good, so I didn't do to initially.  I'm wondering if a good cleaning and some more rounds runt through it might fix the problem.  It just seems just a tad tight.
I will follow up with what i find out.
Here is a question about triggers - I know that Volquartsen is working on a trigger for this pistol.  Are they good triggers, or is there something better out there in the Bullseye community.  For example - In Highpower, Geissele is kind of the go-to trigger.  What do you guys use?
Your chamber could be either tight or have some roughness. Also, I would use a good light oil on the bolt after cleaning. The best trigger pull I ever felt on a .22 pistol came from Clark Custom, but that was many, many years ago. Clark makes a replacement trigger which helps. They advertise complete trigger jobs on Rugers for $125. Of course the new MK IV might be too new for them to work on. It would be worth a phone call to check them out.

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Re: Ruger Mark IV

Post by rich.tullo on Sat Oct 22, 2016 11:03 am

I would not be disappointed with the Ammo most target pistols have their preferences. 

Ruger triggers have not been great out of the box lately there are aftermarket fixes Clark and Volquartsen. 

Personally, if I were to buy a Ruger I would seriously consider an MKII.

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Re: Ruger Mark IV

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