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Thread: Measuring grooves in original Maynard 2nd model

  1. #1
    us1863 is offline
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    Measuring grooves in original Maynard 2nd model

    Would like to get the grooves in an original 2nd model Maynard measured. It shoots a .515 Rapine round OK but looking to improove performance with a custom made round. Looking for someone going to the fall nationals who has a set of 3 fingered mics to measure the grooves in the barrel for a small fee.
    God save the Union from those who cling to their guns and their bibles.

    Tom Waddell
    10th Mass Battery

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    RaiderANV's Avatar
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    Bring yer toy by Lodgewood and we'll gauge it fer FREE :shock:

    We'll even have the correct mold/bullet fer ya 8)
    Never squat with yer spurs on!!!

    Pat "PJ" Kelly #5795V
    Virginny & Texas
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    MAYNARDS RULE!! & starr's DROOL!
    Hence the rust. MAYNARDAE LAUS DEO!

  3. #3
    us1863 is offline
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    Thanks Pat

    The Maynard shoots a .515 round OK but figured knowing the actual barrel diameter could only help. The Lyman 575213 I got from eBay didn't work out so still looking for a Lyman 580213 mold. Sent Lodgewood an email. Hopefully they have one.
    God save the Union from those who cling to their guns and their bibles.

    Tom Waddell
    10th Mass Battery

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    Lou Lou Lou is offline
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    Tom
    Push an oversized round through it from the breech. I have .517 and .518 rounds
    Lou Lou Lou Ruggiero
    Tammany Regt-42nd NYVI

  5. #5
    us1863 is offline
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    Thanks Lou

    Thanks Lou,

    Tried that method. Works OK to get an impression of the lands and grooves but accuratly measuring the 3 off-set grooves is still a problem. Now if they only had 4 lands and grooves a standard pair of mics would work.

    Did you know crime investigators use a similar method? The paste dentists use to take an impression of your teeth is used to get an impression of the lands and grooves in a firearm. With this method they can match the marks on the bullet recovered from a crime to a firearm, even if the barrel has had a screwdriver shoved down the barrel after a crime was committed to change the marks left on the round. Just a little bit of useless trivia.
    God save the Union from those who cling to their guns and their bibles.

    Tom Waddell
    10th Mass Battery

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    3-Groove Slug Measurer

    10th Mass Type.....the magic specialized micrometer is named a V anvil micrometer. Google it on the internet and eBay to see what they are like. They are made in various sizes and mostly are used for precision measurement of 3-flute drill bits and milling cutters. The bullet-measuring V anvil micrometer has a range of .10 to .90 (or so). So push an oversize lead ball through the bore, making sure it completely fills the barrel grooves (no light showing as you look down the bore in the slugging process) to ensure a true profile of the barrel groove depth.

    I will bring mine to Winchester this weekend. Where is the 10th Mass. camp?

    There was a discussion about this device on the BB a few years ago, but the exact name of the tool didn't make then make it into the thread. My thanks go to the proprietor of AndyLand who pulled out a vintage Sterret catalog in his archives a while back to sleuth out the proper nomenclature.

    Armed with the name, it was easy to find them on the internet. New, they can run as much as $500, used, around $150.....There are also V anvils to measure 5 grooves.

    Yours in the hobby...
    Dean Nelson
    1st MD Infantry, CSA, N-SSA
    "...rather have a bottle in front of me than a frontal lobotomy." D. Parker

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