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.44 Magnum Carbine Adjustment/Jamming

This is a discussion on .44 Magnum Carbine Adjustment/Jamming within the Ruger Semi-Auto forums, part of the Rifle & Shotgun Forum category; Having jamming problems with my Ruger .44 magnum carbine (1979 production). Purchased used (barely, actually in pristine condition). On recoil, empties aren't fully being ejected ...


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Old December 12th, 2009, 10:12 AM   #1
 
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.44 Magnum Carbine Adjustment/Jamming

Having jamming problems with my Ruger .44 magnum carbine (1979 production). Purchased used (barely, actually in pristine condition). On recoil, empties aren't fully being ejected and can stay in the loading port as another round tries to enter the chamber. It's a mess. Sometimes may not chamber a round on recoil if it does fully eject an empty case. Manually loads one at a time perfectly.

Here's what I've done - disassembled rifle (not the trigger group and did not remove the gas port plug) and cleaned everything. It was not very dirty (rifle was actually almost pristine). I took care to clean the port from the gas piston using solvent soaked pipe cleaner - there was a very limited amount of carbon removed from the gas port, but not much. I lubed everything and reassembled. Nothing changed. Same problems.

Checked extractor - it's nice and tight. Seems right. Am shooting factory 240g JSP from Winchester. Gas piston freely moves (clunks when the rifle is pointed up and down).

I did notice on last stripping-cleaning that there the piston plug set screw is adjustable. No notice in the manual from Ruger regarding adjustment of this and I have been unable to find ANYONE who can tell me what the heck this part is used for.

As I bought a used rifle, I don't know what the setting of this adjuster should be on a factory new rifle (the set screw opens/closes space between the back side of the gas piston and the stop behind it). Could too little/much space here be causing my jamming problems?

Any suggestions/opinions will be most welcome. TIA



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Old December 14th, 2009, 02:47 PM   #2
 
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I reached out to Ruger directly via email to their Customer Service folks. Here's the message I sent them:

"I recently puchased this Ruger .44 Carbine used. What is the proper out-of-the box setting for the piston plug set screw (part # C89)? Under what conditions can/should the set screw be adjusted? I could not find any information either in the manual or online via any other resource. Thanks in advance for your help."

I got the following response within TWO HOURS!!! That's only about 2 days and 22 hours faster than they promise on their website.

Response:
"To reset the piston plug set screw: with the action closed, screw in until you see the slide handle move. Then back off 1/8 of a turn. This is only needed if you experience problems such as feeding or jamming, anything that may be caused by the gas being regulated"

Just to close the loop on my original entry - I'll be trying out the adjustment next weekend at the range. Should be interesting. But either way, I am exceedingly impressed with the speed of response from Ruger.
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Old December 15th, 2009, 05:23 PM   #3
 
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Nice work, have fun.
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Old December 16th, 2009, 01:53 PM   #4
 
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Hey I just picked one up as well! I havent shot her yet. I would like to clean her up and found a manual online. Let us know how your range session goes!
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Old December 16th, 2009, 03:11 PM   #5
 
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Quote:
Originally Posted by 505markf View Post
I reached out to Ruger directly via email to their Customer Service folks. Here's the message I sent them:

"I recently puchased this Ruger .44 Carbine used. What is the proper out-of-the box setting for the piston plug set screw (part # C89)? Under what conditions can/should the set screw be adjusted? I could not find any information either in the manual or online via any other resource. Thanks in advance for your help."

I got the following response within TWO HOURS!!! That's only about 2 days and 22 hours faster than they promise on their website.

Response:
"To reset the piston plug set screw: with the action closed, screw in until you see the slide handle move. Then back off 1/8 of a turn. This is only needed if you experience problems such as feeding or jamming, anything that may be caused by the gas being regulated"

Just to close the loop on my original entry - I'll be trying out the adjustment next weekend at the range. Should be interesting. But either way, I am exceedingly impressed with the speed of response from Ruger.
___________________________________________

505markf, when mine starts acting up like yours, I clean the gas port in the barrel. It plugs very quickly with firing debris and for sure if you've shot lead bullets, it will be plugged and hard to clean. I don't think I've ever mess with the piston plug set screw adjustment but I have had to clean the gas port several times. Just a thought...
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