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Couple of uncommon gages, 5.56/.45

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  • RCS
    replied
    Here are drawings of a 30-06 headspace gage used by ordnance sometime before WW2. Note that it is adjustable Click image for larger version

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  • RCS
    replied
    I would think you would have to be checking the headspace on hundreds of rifles each week to change the reading on your headspace gages. If you buy military or used commercial gages at a gun show, there is no way to know if they are correct. Also sometimes difficult to check headspace gages as the location of measurement can be different between commercial and military gages. You could contact a commercial manufacture to find out if they would check gages of their manufacture. I have commercial gages for both 30-06 and 5,56mm but also have a set of WW2 30 cal gages and some are not correct. Some of these gages have the dimension lined out and a different number on the gage. My military 1.945 gage is not correct nor is the 1.943 gage.

    photo shows my WW2 30-06 gages Click image for larger version

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  • m14brian
    replied
    Originally posted by RCS View Post
    Headspace gages used in rebuild and maintenance in military service had a gage card. the gages were sent in once a year to be checked and the gage card had the date and other information listed plus the actual measurement. I have alot of 30 cal gages but have no idea if they are correct, I would not check rifles with them. The 30 cal M1 carbine gages do appear to have close to the correct measurements. Click image for larger version

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    Is there anywhere to "send them in" to today to be checked? Even for civilian production ones? Or do you just have to buy new ones every so many years. I know you wrote the yearly check was the standard, but I wonder how many rifles they checked per year ballpark approximately per armorer/gauge.
    m14brian

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  • RCS
    replied
    Excellent article "Headspace and Ammunition Gages" in the GCA Journal Volume 35 Issue 1 Winter 2020

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  • RCS
    replied
    Headspace gages used in rebuild and maintenance in military service had a gage card. the gages were sent in once a year to be checked and the gage card had the date and other information listed plus the actual measurement. I have alot of 30 cal gages but have no idea if they are correct, I would not check rifles with them. The 30 cal M1 carbine gages do appear to have close to the correct measurements. Click image for larger version

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  • Jersey Devil
    replied
    Awesome, Curt!
    I'd love a shot at a complete armorer's kit!

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  • CCyooper
    started a topic Couple of uncommon gages, 5.56/.45

    Couple of uncommon gages, 5.56/.45

    Click image for larger version

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    Here are a couple of USGI gages that you don’t see that often. Not rare but not often available. The 5.56 field service gages at one time were kind of expensive, I think Bill was getting $600 each. I suspect they are readily available now as I’ve seen complete armorers kits available. I have no idea what the .45 no go gage demands. It was for the M15 pistol and was made obsolete. I believe the last contract was mid to late 70’s.

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