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  1. #1
    Legacy Member brian1's Avatar
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    1903 field test bolt?

    In going through my Dad's effects, I came across a 1903 test bolt. It was in a package marked "Packed October 1954" and was inside multiple layers of long term storage wrappings. Inside, the bolt was heavily coated with a thick, black, sticky grease. Once I got all that wiped off, the thing is, of course, like the day it was made. Now that I've seen it, I'm pretty sure I had seen another one like it, without all the long term storage wrappings and grease, somewhere in my Dad's stuff, but I'm not sure where it is right now.

    I'm wondering what this is for and if it's of any value to anyone. Like a go-no gauge for when a rifle was issued or at a match?

    The outer wrapper had a label I was able to salvage, and it says:
    J012-55-20656
    BOLT, FIELD TEST
    5520656
    METHOD I
    PACKED OCT. 1954 RIA

    I assume the RIA is Rock Island Armory

    There was another label between the outer cloth-based wrapping and the inner paper-based wrapping that said the same thing.

    The bolt is also etched:
    U.S. RIFLE CAL. .30 M1903
    FIELD TEST BOLT
    G-20656 ORD. DEPT. U.S.iconA.
    W&S

    Near the bolt head is etched: MIN. .509





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  4. #2
    Legacy Member MasterChief's Avatar
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    Wonder if it's for a secondary check on a receiver that fails max headspace measurement? In effect a "known-good" bolt...

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    Legacy Member Wineman's Avatar
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    Nice to have a headspace gauge that did not need you to take apart a bolt and see if it passes. An interesting concept, great for volume checks: pull bolt, test with Field Bolt, reject or pass, next...

    Dave

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    Legacy Member RCS's Avatar
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    I looked up the FIELD TEST BOLT in my TM 9-1270 ordnance manual on M1903 rifles. "test bolt is used in conjunction with
    headspace gages to determine whether the chamber, bolt, lug seats in the receiver, or all of these, are worn beyond
    serviceability".

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    Legacy Member Calif-Steve's Avatar
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    RCS is correct. Depot would use them with all of the Headspace gages to figure out if barrel, receiver, or bolt were good/no good. Handy tool. They used to be around and I bought 2 of them. Not expensive but fun.

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    Legacy Member brian1's Avatar
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    Thread Starter
    I'm resurrecting this thread I wrote last year. I also found the other one that I'd seen as opened and used in my Dad's stuff. It's just like the other one, except it has some light pitting on the body. My Dad used to work a lot on the Springfield bolt action rifles. I'm pretty sure these are nothing I'll ever use. Are they anything any of you 1903 people can use? If so I'd send you one for $10 for the cost of shipping.



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  11. #7
    Contributing Member Doco overboard's Avatar
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    I would like to own something like that.
    Will pm message after work day for shipping/ cost etc.
    thanks- Brian

  12. #8
    Legacy Member 1903Collector's Avatar
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    Quote Originally Posted by Doco overboard View Post
    I would like to own something like that.
    Will pm message after work day for shipping/ cost etc.
    thanks- Brian
    Ive got one, and Ive used it, but I was under the impression (and conclusion from unfortunate experience) that the Field Test Bolt is the same as using good normal bolt with a "Field" gage (normally three gages - "GO", "NO GO" & "FIELD"). It was last year and I was chambering a couple NOS A3 barrels and made the mistake of using the Field Test Bolt AND a "GO" gage and cut until the bolt closed on the "GO" gage! Results...2 ruined barrels chambered too deeply which closed when using a good bolt and the "Field" gage!

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