SIGforum
223 vs 5.56 headspace gage

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/630601935/m/3000047164

October 06, 2019, 01:16 AM
Hamden106
223 vs 5.56 headspace gage
Same or different?

I want to check headspace on a RRA NM barrel switch.


SIGnature
NRA Benefactor CMP Pistol Distinguished
October 06, 2019, 09:19 AM
dusty3030
Headspace gauges are the same for these two.
October 06, 2019, 11:22 PM
hrcjon
But it is probably worth noting that there are different numbers for different mfg. of the gauge.
Probably not relevant for a new situation (go/nogo), but a field gauge may be...


“So in war, the way is to avoid what is strong, and strike at what is weak.”
October 07, 2019, 10:29 PM
SgtGold
You're going to need to know the specific chamber spec in order to get the correct gauge.


_____________________________
'I'm pretty fly for a white guy'.

October 08, 2019, 01:11 AM
Hamden106
quote:
Originally posted by SgtGold:
You're going to need to know the specific chamber spec in order to get the correct gauge.


Barrel is RRA NM A2
They list the chamber as
.223 Wylde Chamber for 5.56mm and .223 Caliber


SIGnature
NRA Benefactor CMP Pistol Distinguished
October 08, 2019, 04:48 AM
SgtGold
quote:
Originally posted by Hamden106:
quote:
Originally posted by SgtGold:
You're going to need to know the specific chamber spec in order to get the correct gauge.


Barrel is RRA NM A2
They list the chamber as
.223 Wylde Chamber for 5.56mm and .223 Caliber


I misspoke a bit. The go\no go gauges are the same across the 223\5.56 chambers. The field gauge is larger for the NATO 5.56 chamber.


_____________________________
'I'm pretty fly for a white guy'.