BCG Question.

Originally Posted by bsa1917hunter

Looks like my maximum headspace gauge for the 5.56 NATO I just bought is not the same as a "NO GO" gauge, but closer to a FIELD gauge and probably closer to the colt FIELD headspace dimension @ 1.4736". I think this may have been brought up earlier, but would it be wise to use a .223 rem field gauge as a 5.56 no go, if one has a hard time finding a 5.56 NATO no go gauge?????

The gauges for the NATO 5.56 are spec'ed as Min & Max & the Forster versions are (1.4636 +.0003, -0 for the Min) & (1.4736 +0, -.0003 for the Max).

I use the Forster NATO min gauge as a Go & a .223 Field Gauge as a No-Go.

But you can buy the 5.56 Max gauge from Forster if you really want one.

Forster Headspace Gauges for 5.56

MM

Re: BCG Question. rockinbbar #12108292 06/23/17
Joined: Aug 2010 Posts: 48,026 Battle Born B bsa1917hunter Campfire 'Bwana
bsa1917hunter Campfire 'Bwana B Joined: Aug 2010 Posts: 48,026 Battle Born	Thanks MM. I bought the set of minimum and maximum gauges from Forster. I've been doing some surfing and found that some builders use the Forster 5.56 maximum for the no go gauge. I just checked my LH stag 6HL with its new BCG and it works with the minimum, but will not close on the maximum gauge. There is no way possible that it would close on the max gauge, so I guess I'm good to go. We'll see at the range tomorrow.... ... I am still thinking I'd like to get an in-between gauge like the .223 rem field gauge as well to check the chamber/headspace on my 5.56 rifles. Originally Posted by raybass I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. Originally Posted by Pharmseller You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA

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