dimension difference go-no go ?

[JeffG]

What is the typical variance between the lengths of a "go" and "no-go" gauge? And are "field" gauges typically half way between those?

I'm mostly interested in middle weight cartridges .308, 22-250, hunting applications

Basically how much space is allowable for ease of bolt closure?

 

[Nomad47]

I asked that question a few months ago and never got a real good answer. But I can tell you that the last time I screwed a barrel on a Savage action, the bolt wouldn't close with one layer of Scotch Magic Tape on the back of the go-gauge. And IIRC, that made the go-gauge .002" longer.

 

[Hal]

The difference between a GO and NO-GO gauge can vary from around .004 on bench rest calibers to .006-.008 on some of other calibers.

Hal

 

[KMart]

I just measured a new set of PT&G 243 go/no go gauges. there was .006 difference between the two.

 

[X Ring Accuracy]

Depending on caliber, .004 to .006 is the difference. The field guage is more. It is usually best to use guages from the same manufacturer as well.

 

[Rustystud]

If you follow SAAMI the difference is .0035". You should never mix two different manufactures gauges.

SAAMI requires a gunsmith/manufacture to use steel gauges. Both a go and a no go.

The only two liability insurance companys for gunsmiths/gun manufacdtures specifies in their policy, that all chambers be cut to SAAMI specs.

Nat Lambeth

 

[jscandale]

Oh well, so much for wildcat cartridges...the insurance company says NO!

JS

 

[therifler]

field gauge tells you that your rifle chamber has an excessive amount of headspace and should be repaired . if this gauge goes take the rifle out of service . T.R.

 

[JeffG]

Thanks for all the info. I got totally thrown off by a 280AI, now I'm sticking with a straight 260 set at .002 over my go gauge.