anyone built an AR platform rifle

[teul2]

How would you even get a gauge in there to check the head space? The bolt face is in front of the locking lugs, so when the bolt is closed, it it sealed in the locking "cavity".

[Wildfowler]

I've never used them but they look like a cartridge. They come as a set and you put them in the chamber. The bolt should close or not close indicate a problem depending on the gauge.


http://www.brownells.com/gunsmith-tools ... 26876.aspx

[MudHog]

Information on barrel changes and go/nogo gauges: http://www.shootingtimes.com/reloading/ ... n-minutes/

This is on a Savage bolt action rifle, but similar on other sporting rifles that have a threaded barrel. Rebarreling isn't necessarily a gunsmith required task, IF the barrel is threaded.




I'm not aware that gauges are specific to reamers. The barrel, although reamed, should still meet SAAMI specs, which is what the gauges are built to.

[Wildfowler]

Should have specified that I was referring to the fact that there is a difference between 5.56 and 223 Remington. Also 308 Winchester and 7.62 x 51 even though many people consider these 22 or 30 caliber chambers interchangeable. Are slight differences in the reamer dimensions which could cause errors.

Sorry for any confusion.

[Wildfowler]

Okay I've got to be honest, I may not know what I'm talking about?

They sell various gauges for 223 Remington, 223 wylde, and 556. I assumed there was a difference in those various chambers.

As best I can tell after looking into this a little further the only real difference in those chambers is in the throat portion which is in front of the shoulder and I don't understand how it could be possible for the gauge to detect differences in the throat portion of the various chambers?

So now I am totally confused as to why they sell the various chamber gauges?

[teul2]

[kb7722]