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No-Go, Go-No-Go or Field gauge?

D@D
As I get more old military rifles I'm thinking I should have the headspace gauges to, do I need all 3 or just one.Which ones can I live without? Thanks guys

Guns kill people like spoons made Rosie O'Donnell fat
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Comments

6 comments

Date Votes
  • Tailgunner1954
    "GO" is a Minimum spec chamber. If the bolt will close on a new cartridge you don't need one of these.
    "NO-GO" is a Maximum spec chamber. This is the one I'd recogmend having. Any rifle that closes on this gauge needs to be torn down and repaired.
    "FIELD" is a wartime battle expediant, used on rifles that do close on a NO-GO but the armorers don't have the personal/time/material to make the proper repairs. If the bolt closes on a field gauge, you figgure the receiver, bolt and barrel are nothing but so much scrap metal.

    Whittemore
    Some guys like a mag full of lead, I still prefer one round to the head.
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  • MIKE WISKEY
    i disagree with tailguner above, you should have a 'field' guage for the rifles you refer to. just because an older rifle will close on a 'no/go' guage dosn't mean it is unsafe, might not be easy on brass or the most accurate, but that isn't the guestion. realy the only time a no/go guage 'should' be used is when rebarreling or to check wear on a precision rifle.
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  • D@D
    I've been getting conficting answers to this question all day.[8D]

    Guns kill people like spoons made Rosie O'Donnell fat
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  • Contender Man
    to add to the "soup" ... if you own a No Go and the bolt closes you have been given an indicatior that you have a problem that needs to be looked into ... if you choose to fire or continue to fire the rifle before getting it checked out then your tempting fate. Thus if you can accept this logic and responsibility the guage you need is the NO GO ...


    2470100-M.jpg
    If you only have time to do two things so-so, or one thing well ... do the one thing!
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  • Rocklobster
    Keep in mind that military rifles are not headspaced to SAAMI specs, they use specs that are looser-their chambers are slightly larger than commercial guns. And, military ammo uses thicker brass, and bullets are usually seated out slightly farther. If your rifle will close on a SAAMI no-go gauge, but not on a field gauge, it is safe to fire. If you really want to be safe, use military ammunition, which is usually a milder load than its commercial equivalent. (5.56mm NATO/.223 Rem; 7.62 x 51mm NATO/ .308 Win, etc)
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  • richbug
    You do not need a go unless you are having trouble with the bolt not closing on the ammo you intend to use in it. I keep a field guage in my range bag so that I can keep an eye on new builds and old military rifles that I am suspicious of.

    My border collie is smarter than your honor student.
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