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Anyone know how to clean a BAR?

Discussion in 'Gunsmithing and Repairs' started by smartshot, Sep 30, 2010.

  1. smartshot

    smartshot New Member

    Sep 27, 2010
    Hello all, I own a Belgium Browning BAR from the early 70's (I think its a 72) in 338 win mag and its in really good condition. I hear alot of talk about cleaning the gas chamber and such. I know how to take the forearm off at this time, but am a bit nervous about taking it down any further. I found some stuff online but wanted to speak with someone who has done it before because I'm starting to get alot of jams and think it needs to be cleaned out. Also I recently found out that this model in 338 win mag is rare and worth 40% more than other calibers!! http://www.midwestgunworks.com/field_service_manual/browning_bar_fsm.pdf is the website I found that explains it, but the instructions are a bit confusing.
    Last edited: Sep 30, 2010
  2. rcmodel

    rcmodel Member in memoriam

    Sep 17, 2007
    Eastern KS
    Disassembly of the BAR gas orifice adjustment screw is not recommended.
    It is set at the factory for proper gas port pressure, and you don't want to mess with it.

    Here is a link to an owners manual which is pretty clear instructions for owner service cleaning.

    As for more detailed instructions?
    The factory field service manual you linked to is as good as it is going to get.
    If you are uncomfortable following those instructions, I would suggest you take it to a good gunsmith.

    Or better yet, send it back to the Browning Factory Repair Center in Arnold MO for a complete going over.

    Browning Service Department
    One Browning Place
    Arnold, Missouri 63010-9406

  3. a5werkes

    a5werkes New Member

    Apr 28, 2009
    This is no "adjustment" to the gas regulator screw and gasket. The gas regulator simply screws in / out. There are nominal sizes of the ports in the barrel and the gas regulator screw that are generally inversely related to the caliber size and are enumerated in tabular form in the BAR Field Service Manual previously referenced.

    You may simply remove the gas regulator and thus the gas piston and cylinder are readily available for inspection and cleaning. It is a simple process.

    351 WINCHESTER Senior Member

    Mar 19, 2007
    First off I would clean the chamber with a chamber brush really good and clean the barrel too. Make sure the chamber is completely dry and free from any oil or solvents prior to shooting. Let us know if that fixes the jams.

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