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Thread: What Pin Gauges Do I Need For Barrel Measurement?

  1. #1
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    Question What Pin Gauges Do I Need For Barrel Measurement?

    OK, so like everybody else right now, I have too much time on my hands.

    I have a so-called 1855 Artillery Rifle - somewhat of a frankenrifle with a mix of original and (mostly) repro components. It's the barrel that is a mystery to me. It is - I believe - a very early Jencso barrel. The underside is marked "11-84 SMJ&M 024" - so I'm assuming manufacture in November 1984 and a serial/barrel number of 024. I believe "SMJ" stands for Steven M. Jencso", but not sure about the "&M" at the end. Maybe one of you can tell me?

    Anyway, the barrel has an eight-land, eight-groove bore and is very clean and new looking. I don't think it's possible that it's the original bore. Plus, it appears to me to be oversized. I'm not set up to do an accurate measurement, but my "normal" .575" - .578" Minies slip right in and are obviously too small. As best I can tell, the land diameter is at least .583" and may be larger than that.

    What size pin gauges would I need to figure out the actual bore diameter? And do any of you know of a source (maybe someone here) who could rent/loan me the needed gauges? Once (if?) we get set free out here, I would like to be ready for a range session.

    Thanks in advance and be safe in these uncertain times,

    Tom
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  2. #2
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    Travers sells them. Here is .575-.584 minus gauges. Minus gauges will fit in the hole they are marked for.

    https://www.travers.com/class-zz-ind...2&series=Minus

    They are $3.65 each.

    So, you can get a whole set for $40 plus shipping.

    Steve
    Steve Sheldon
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    4th Louisiana Delta Rifles
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  3. #3
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    Thanks!

    Much appreciated!

  4. #4
    Nd1887 is offline
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    I ordered 6 a couple weeks ago from Travers and 3 are still on back order but I could still figure out the bore sizing.
    3rd Great grand son of Pvt John Simon's 6th Minnesota Company E

  5. #5
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    Yes mine came in in 3 separate shippings also.

    There is a check box on the checkout that says "ship as single unit" where they will hold until all are together.

    Steve
    Steve Sheldon
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    4th Louisiana Delta Rifles
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  6. #6
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    Thanks again!

    Steve - got the pin gauges in today?s mail & am now all set. My Minies need to be .580?

    Thanks again for your help.

  7. #7
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    Glad you are set up!

    Could be! I had a musket once that gauged at .584! I ended up re-barreling it.

    Steve
    Steve Sheldon
    Commander
    4th Louisiana Delta Rifles
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