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  1. #1
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    Mosin Nahant 7.62x54 M44 Bolt won't close on round

    I have an M44 which closes just fine on an empty chamber, but which cannot close on a chambered round. It strips rounds from the magazine just fine, but cannot close. The resulting round is somewhat gouged when ejected.

    Any ideas what might be wrong or how I could fix the issue?


    Thanks!

  2. #2
    I am a Forum User
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    Short headspace? Where are the rounds being gouged?

    Is this a matching numbers gun, specifically the bolt and the barrel?

  3. #3
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    Has this recently happened? Usual cause is built up lacquer that the rounds are coated in that melts down somewhat and coats the chamber. That thickness builds up and then it's next to impossible to chamber a round, but the bolt will close without a round.

  4. #4
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    Does it close on just an empty case?

  5. #5
    MGO Member Ol` Joe's Avatar
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    Quote Originally Posted by GreaseMonkeySRT View Post
    Has this recently happened? Usual cause is built up lacquer that the rounds are coated in that melts down somewhat and coats the chamber. That thickness builds up and then it's next to impossible to chamber a round, but the bolt will close without a round.

    This.
    The scratches are from grit that imbeds in the lacquer in the chamber. A rusty chamber will produces similar symptoms.
    "Saepe errans, numquam dubitans --Frequently in error, never in doubt".

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  6. #6
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    Thanks for the replies all, this has been happening since I have had the weapon.

    Numbers match

    How would I fix the lacquer issue?

  7. #7
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    http://7.62x54r.net/MosinID/MosinCleaning.htm#Sticky


    Sticky bolt syndrome is a term commonly used by Mosin Nagant shooters that actually refers to the cartridge case sticking inside the chamber making normal extraction difficult or even impossible. While a burr in the chamber can be the cause, this is uncommon and outside the scope of this article. Typically the problem is due to a dirty chamber and is aggravated by lacquer coated cartridge cases which are common among surplus Eastern Bloc 7.62x54r cartridges. However, it is not limited to lacquered cases and can be experienced with brass cases and to different extents with different varieties of lacquered cases. The problem often becomes worse the hotter the chamber is and a cold rifle might function fine and then lock up after five to ten shots, returning to normal after cooling off. Forcing extraction by hitting the bolt handle with a mallet is not recommended as it puts excessive strain on the extractor which can weaken it to the point that it eventually breaks. The case head can also separate leaving the body in the chamber requiring a case extraction tool to remove. The proper short term solution to removing a stuck fired case is to turn the rifle muzzle up and insert a cleaning rod down the bore. While firmly pulling on the bolt handle drop the rod from a height of about six inches above the rear of the cartridge case allowing it to bounce against it. Usually one to three tries will be sufficient to dislodge the case and open the bolt. At this point the firearm should not be fired until the underlying problem is corrected. The long term solution is to thoroughly clean the chamber removing any built up lacquer transferred from the cartridge cases while shooting or dried cosmoline or oil from storage. My preferred method is to use a short cleaning rod, such as a single section from the cheap three piece cleaning kits, with an oversized brush such as those designed for a 20 gauge or 12 gauge shotgun. Nylon brushes are suitable for this as they hold up better and the chamber walls are smooth rather than grooved. Wrap the brush with some deleading wool (see tools, supplies, solvents and oils above) and dip it in solvent such as Hoppe’s #9. Chuck the rod in a drill and run it at slow speed for 30 seconds to a minute while moving it forwards and backwards in the chamber. Swab out the chamber thoroughly with more solvent and repeat the process. Give the chamber a thorough final cleaning paying close attention to any fouling or pieces of brush or deleading wool that might have dislodged in the receiver or bore. The chamber should be left dry for shooting or lightly oiled for storage. In no circumstances should cartridges or the chamber itself be oiled to ease extraction. Friction between the case and chamber walls during powder ignition is an important part of the design of most firearms and reducing this can place undue strain on the bolt locking lugs leading to catastrophic failure and injury in extreme cases. Polishing compounds should not be used in the chamber as they are abrasive and designed to remove metal, even if only a small amount. Over time it may be necessary to repeat the cleaning procedure, especially if lacquered cases are used regularly. With experience the onset of the problem will be noticed before it becomes a serious issue and the cleaning can be done before a range session is interrupted. In extreme cases it may be necessary to switch to a different type of ammunition to completely resolve sticking cases. Proper lubrication of the bolt is also necessary for smooth operation and the combination of a slightly dirty chamber and a poorly oiled bolt can compound what would be a minor problem into a frustrating shooting experience.
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  8. #8
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    How far is the bolt from closing and where are the gouges on the round you were trying to chamber?

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