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Barnard Firing Pin’s for Barnard Target Action · PDF file Barnard Firing Pin’s for Barnard Target Action Measurement details for each firing pin model as below; - Action Models

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  • Barnard Firing Pin’s for Barnard Target Action

    Measurement details for each firing pin model as below; - Action Models Measurement (A) Measurement (B) Pin Tip Protrusion

    Length from bolt Face

    P, P (Dovetailed) & PC 123.0mm to 123.1mm 28.9mm 0.055 to 0.060 Inches

    PL, PLM & P-CHEY 138.0mm to 138.1mm 28.9mm 0.055 to 0.065 Inches

    GP Approximately 181.0mm 57.55mm 0.070 to 0.080 Inches

    S, SC & SM "308" 115.1mm to 115.2mm 28.65mm 0.055 to 0.060 Inches

    S & SC 223 115.1mm to 115.2mm 28.9mm 0.055 to 0.060 Inches

    Disassembly instructions for replacing the Firing Pin Spring

    • Start by removing the firing pin out of the bolt. This is done by removing the threaded bolt

    cap from the end of the bolt body. Remove the firing pin from the bolt body and slide the

    shroud off the cocking piece. This will leave you with the firing pin as seen in the above

    picture.

  • • securing the firing pin tip in a vice. Heat the Cocking Piece up with a lighter flame, to around

    140c or until smoke starts to come out of the end of the cocking piece.

    • With a 4mm Allan Key Remove the M6x8mm Grub Screw (anticlockwise rotation).

    Please note, extra heating may be needed if the grub screw is still locked up. do not heat to

    over 300c.

    • After the cocking piece has cooled down undo anticlockwise with an adjustable wrench. Be

    careful while taking the cocking piece off as the spring will still have tension and will push

    the Firing Pin Washer and Cocking Piece off the firing pin shaft and can be lost.

  • • Blow the Threaded hole of the cocking piece out.

    • Check that the now “springless” firing pin shaft threads into the cocking piece smoothly,

    “if not then follow the below instructions”

    o Secure the cocking piece in a vice or grips as below; -

    o Using an M6 x 1 tap, re-thread through the hole to clear out any Loctite still in the

    cocking pieced threaded hole.

    o Once this is done blow the hole out again and re check the cocking piece on the

    firing pin shaft.

  • THE FOLLOWING STEPS WILL REQUIRE A SINGLE STAGE

    LOADING PRESS

    • Insert a .30 Cal shell holder on the loading press shaft.

    • Screw the striker press tool into the die holder of the loading press.

    • Slide the replacement striker spring over the firing pin shaft.

    • Insert the striker pin with spring up into the striker press tool and then allow the firing pin tip to

    rest on the .30 Cal shell holder (with the long part of the tip sitting down through the primer

    hole of the shell holder)

  • • Hold the firing pin washer onto the recess of the striker press tool while gently loading the

    spring up against the washer, retaining it in place.

    • Ensure the firing pin spring, washer hole and shaft align.

  • • Compress the striker spring until the threaded shaft protrudes about 10mm above the

    washer, be carful not to over compress the spring.

    • Screw the cocking piece onto the firing pin shaft in a clockwise direction and remove the

    secured firing pin assembly from the loading press.

  • • Measure the overall distance (a), as seen in the firing pin details section. Adjust the overall

    length by rotating the cocking piece clockwise to shorten or counter clockwise to lengthen

    the overall length.

  • Please note the following; - if measuring with a Vernia/calliper measurement devise add on

    0.1mm to the overall length of measurement (A)

    • Once the overall length has been set to the desired length insert the firing pin into the bolt

    body and check for a gap of approximately 0.3 to 0.6mm between the front radius of the

    cocking piece sear and the bolt body when in the fired position, as seen below; -

    the cocking piece should be able to move from side to side slightly.

  • • Secure the firing pin in an upright position.

    • Add 1 drop of 680 Loctite to the end of the cocking piece’s threaded hole.

    • Insert the M6 x 8mm Grub Screw and thread into the hole clockwise until it bottoms out on

    the firing pin shaft. Be careful the shaft does not rotate with the grub screw when

    tightening. Rotate the grub screw back and forth prior to tightening up on the firing pin

    shaft. This ensures the Loctite can work itself into as much thread as possible.