Gunsmithing Are All Headspace Gauges Created Equal ?

[Doug308]

Are the different brands of gauges all ground to the exact SAAMI specs ?

If I had a .308 GO Gauge from PTG, Manson, Forster, Clymer, would all of them measure exactly the same ?

 

[Deleted member 10043]

I have some that are from different makers for the same caliber. All you have to do is measure them to see they are within specs.

 

[FisherT&C]

They may all be slightly different. The general rule with headspace gauges is not to mix brands to make a Go/ No Go set.

 

[DAVETOOLEY]

There is a +/- tolerance that is allowed by SAAMI.
So to answer your question. No they probably wouldn't measure the same.

 

[Deleted member 10043]

They may all be slightly different. The general rule with headspace gauges is not to mix brands to make a Go/ No Go set.

I agree but that wasn't always or is the case where supply isn't meeting demand. So, measure twice headspace once. I've not experienced a problem with gauges from two different manufactures. As long as they are within specs than WTF. Hell, I've measured new brass cases that were within tolerances. Probably for good reason.

 

[LRI]

I can answer your question OP with a firm NO. I have at least 4 individual GO gauges (all in the same cartridge) made by a single manufacturer and not a single one of them is like the other.

They are within the SAAMI guideline, but the gauge line to case head distance is different.

 

[Easy_E]

On a side note who sells ring gauges to check the go/nogo gauges ? We just had an issue with rented 17 fireball gauges the reamer print give the case size with a certain ring gauge .