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stefanosg · 03-03-2006, 09:47 PM

I think it must have to do with reloading or gunsmithing. The thing does look a little like a 9mm brass casing. Below is some text I found on the topic.

"These Go /No-go gauges are designed to verify that chamber headspace is within tolerance from the base to the shoulder. It is best to remove the ejector on most rifles so that you can "feel" these gauges as they are chambered. The Go gauge can also be a handy tool that can help you check the depth setting on your NK or FL resizing die"

03-03-2006, 09:47 PM	#3
stefanosg User Join Date: Jan 2006 Location: East Central Florida Posts: 367 Thanks: 1 Thanked 7 Times in 2 Posts	I think it must have to do with reloading or gunsmithing. The thing does look a little like a 9mm brass casing. Below is some text I found on the topic. "These Go /No-go gauges are designed to verify that chamber headspace is within tolerance from the base to the shoulder. It is best to remove the ejector on most rifles so that you can "feel" these gauges as they are chambered. The Go gauge can also be a handy tool that can help you check the depth setting on your NK or FL resizing die"