go no-go question

[confuzed]

I am not quite sure how to use a go gage and no-go gage, just from reading this forum, I know a lot of you know your stuff.I would like to learn anything you could tell me on this. thanks

 

[Eddie Harren]

If you consult any good reloading manual, the subject of headspace and the use of "Go" and "No Go" gauges is explained very well.

 

[Preacher]

It's really quite simple--
Use the go gauge to set up the chamber to just close on that gauge.
Use the no-go to set up the chamber so the bolt will not close on that one.
In other words...
A go gauge will allow the bolt to be closed on it, and a no-go gauge will not allow that to happen.
If a no-go gauge will allow the bolt to close, your headspace is off.. ,to long)....

 

[JayIdaho]

Remove the firing pin and ejector before trying the gages. Never force the bolt to close on a gage.

 

[Cheechako]

Dittos on what Jay said. It cannot be emphasized too much.

When it's said that the bolt should "close" on the Go gauge it means that the bolt handle should drop to the closed position from its own weight, not closed by applying any pressure to it. The same for the No Go.

Ray

 

[Rustystud]

Confuzed:

Go and No Go Gauges date back prior to the industrial revolution. The use of gauges gave the unskilled man the ability to do precision work. Gauges are used extensively in most third world countries today. They are the strandard in Japan.

There are Go and No Go gauges for almost every measuring application, IE: holes, threads, etc.. In the world of firearms there had to be a system of standards, therefore SAAMI,SMALL Arms and Ammunition Manufactures Institute) was formed. This gave a industry standard for which both the firearm makers and the ammunition makers could work toward having a cross the board standard. In America we have very liberal tort laws. If one business sells another business's product and someone becomes injured then everybody gets sued. Retailers, wholesalers and manufactures needed a industry standard for the insurers. SAAMI is the firearms standard accepted by the insurers. SAAMI standards require that "steel gauges" be used in setting the headspacing on firearms that are to be insured. This rules out a level of human error. SAAMI spec Go and No Go chamber gauges have a .0035" difference in headspacing length. This is felt to be enough spacing variation for all the parties to work within and have a safe firearm. There are many ways to headspace a firearm but when steel Go and No Go gauges are used it is a no brainer.

There are several different methodologies of headspacing depending on the case type, rimmed, rimless, and belted. This is another whole subject.

I hope this has not confuzed you any further. I have read hundreds of articles and refrences to headspacing. I feel Wayne Van Zol has given the best explaination that I have ever read. I think that article was in the last edition of Frank de Haas book titled Bolt Action Rifles.

Rustystud


Rustystud