RUGER MK 3

This may not apply to mis fires so FWIW, I was advised to run a brick of cci mini mag to break in my mark iii. Function has been 100% with great accuracy, I never shoot anything else.

I use cci std velocity in some of my bolt rifles, I dont recall ever having a miss fire. Obviously the OP should be looking at the primer strike on a mis fire and saying something about that in his post.
 
Since age/condition of the gun may be in question, you might look at the firing pin and spring. They may need replacing to get a better strike on those hard to ignite ammo.
 
Since age/condition of the gun may be in question, you might look at the firing pin and spring. They may need replacing to get a better strike on those hard to ignite ammo.
Click to expand...

I have very good results with the VQ firing pin kit with the Mark III. Easy to swap out. Same with the extractor.
 
I have a MK III and had some slight reservations about buying it over an older one but it has been 100% reliable with every ammo I've shot in it. A lot of .22 autos do have a preference on one ammo or another and I'm not sure if they are just not broken in yet or the fact that springs in some pistols need to take a set. I've heard of quite a few pistols that people swear by leaving the slide locked back for a couple days but I've never used this technique. Good luck getting it figure out.
 
I have several Ruger Mark I, II and IIIs. The Mark I wasn't too good the firing pin spring broke in it at about 30,000 rounds. I replaced it and it's been Ok since, that was about 8 years or so ago. The rest soot reliably and no issues with any ammo except the Remington Gild Tips. None of my arks can shoot them. They work in my Ruger 10-22 but not the pistols. They also have a high failure rate in my other .22 cal rifles. The main thing I've seen give the Ruger Mark problems is lack of use and sitting up for long periods. Dry firing can be an issue as with most rim fire guns. They are relatively tolerant to dirt but it too can cause problems. PS - the trigger plunger and spring is easy to remove without a total disassembly by removing the front transfer bar pin and lifting it up. This exposes the plunger and spring.
 
I'd say after 30,000 rounds, and all you've had is a broken firing pin rebound spring, that you've had some very superior performance from that pistol. Rebound springs run about $2.50, so if you translate that over the 30,000 rounds fired, maintenance costs have been very cheap.

I've been working with, and on, Ruger Mark pistols since 1970, and have encountered just about every conceivable issue that can befall a .22 rimfire pistol. Ruger Mark pistols have earned a place in the shooting regimens involving bullseye, silhouette, steel, and any other type that's now being done.

Rugged pistols, and once these pistols have been "smoothed and tuned", will perform and shoot very well against any of the current USA made .22 caliber pistols now available.
 
I picked up a MKIII hunter about 5 yrs ago. It misfired or misfed sporadically. Removed the LCI, and added a bushing, and a volquartsen sear and trigger, it never misfires. I picked up a MKIII slab side competition model, and I will shoot it, but as soon as these parts come in for it it will have them installed.
 
Ruger FTF

I have a Mark II I bought new several decades ago. I had a time where I was getting some FTF in almost each magazine after many previous years of perfection.

I decided to let a Gunsmith give it a first rate cleaning for maybe the first time ever totally disassembled. The gun has been flawless ever since.

I think just about any semi-auto needs certain level of maintenance. Particularly a 2nd hand gun. I suspect that may be all it needs - but I have been wrong before.
 
I've been shooting Remington .22 rimfire ammunition since I was a young lad in the late 50's. I don't recall having any of the problems with that ammunition that I've seen since Remington was bought out by Cerberus. It's to the point where I will pick up a box every now and then to try, and see if they've gotten better, but I expect ALL the rounds in a 50 round box to make a repeatable noise, when the trigger is pulled. Not like this one:



Some of the comments concerning the Ruger Mark pistols that have been posted here, are not within the realm of what I have experienced when working and tuning these pistols for 45+ years. Once the mainspring housing assembly has been removed, along with the bolt, the upper barrel/receiver assembly is then moved forward for removal. Once that's done the top of the trigger plunger becomes plainly visible, along with most all the internal parts. So, gunk or anything that interferes with the triggers action, would easily be accessible.
Once these Ruger Mark pistols, and their magazines, have been "tuned and smoothed", you won't believe it's even the same pistol any longer. A replacement sear will bring the trigger pull down to 2 ½ to 3 pounds. An adjustable trigger will shorten pre and over travel to minimum distances. A much better extractor will pull spent cases from even a very dirty chamber and then all the internal parts will operate much more smoothly, including drawing the bolt backward for charging a round into the chamber. So, no, the Ruger Mark pistols as shipped from the factory may not have the same price tag as the Smith & Wesson Model 41 has, but the Model 41 that I had for a while was sent back to Smith & Wesson 3 times before it became a reliable pistol, and then, only with CCI Standard velo ammunition. The Ruger Mark pistols I now own personally, have all been tuned and smoothed along with the magazines used in these guns, and they perform without any hiccups what-so-ever, with all sorts of .22 rimfire ammunition, other than Remington.
 
Just wanted to say, for those who may not know, SGW is very well known as an authority on these and other rimfire related weapons. I owe him many thanks down through the years for invaluable help, especially with my Mk3. So..THANKS!! I go by another screen name on that other forum.:D
 
I have a few Ruger Mark pistols of different ages an they are very reliable and will eat just about every type of ammo I have fed them EXCEPT the Remington Gold Tips. SGW is right there. I have a thousand rounds and can't bring myself to sell it to someone else and I can't seem to use it in what I have. I also tried it in a Springfield rifle and it wound fire in it either.

Good luck with your Ruger and let us know what the problem was when find out.
 
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