.223 vs 5.56 go no gauges?

[Mike14_07]

Bought some .223 go/no gauges, but the no go shuts on a 5.56 chamber. Gonna order some 5.56 gauges but all i can find is 5.56 no go gauge and a field gauge. So is the go gauge the same?

[titsonritz]

Unless you are making barrels all you need is a 5.56 field gauge

[Mike14_07]

Unless you are making barrels all you need is a 5.56 field gauge

K ill order one now. let me ask you this, i removed the ejector and the extractor from the bolt. If i just put the bolt in the carrier, it will close on the go gauge. If i put the cam pin in and firing pin to hold it, the bolt wont cam into place?

[Iraqgunz]

Using a .223 gage will give you an incorrect reading. This has been mentioned many times in the various threads on the topic. I would also recommend following the procedures outlined in TM 9-1005-319-23&P.

[Mike14_07]

Using a .223 gage will give you an incorrect reading. This has been mentioned many times in the various threads on the topic. I would also recommend following the procedures outlined in TM 9-1005-319-23&P.

I could see on the no go gauge but i would think the go gauge should work

[26 Inf]

Using a .223 gage will give you an incorrect reading. This has been mentioned many times in the various threads on the topic. I would also recommend following the procedures outlined in TM 9-1005-319-23&P.

A little off-topic - are you aware of any one currently selling the NSN field gage?

[Todd.K]

First off people need to stop talking about commercial gauges as GO and especially NO-GO. I want the HS number on a gauge. Commercial NO-GO gauges vary by manufacturer and are almost always designed by and for bolt action gunsmiths. The allowable HS for SAAMI, bolt gunsmiths, and a new M4/M16 are all slightly different.

If you are using a quality barrel follow the 23&P. If you want to understand the difference in HS numbers let me know and I'll dig it out of my notes.

[Iraqgunz]

No. And the only gage that I would trust (aside from the NSN), is the gage sold by Brownells under the name Colt Field II Gage as I recall.

A little off-topic - are you aware of any one currently selling the NSN field gage?

[bruin]

I searched quite a bit for the NSN gauge to no success, but picked up the Brownells Colt Field gage on IG's recommendation. I asked Brownells and they said it's made by Foster. The packaging confirms this.

Sent from my SM-T810 using Tapatalk

[T2C]

With a properly installed and broken in barrel, I expect match rifles to shoot 1/2 MOA at 300 yards with good loads. I purchased Go, No Go and Field Gauges, so I could use them on both my match rifles and carbines.

If all I was interested in was a safe carbine for slinging lead, I would just purchase a Field Gauge.