Jump to content
308AR.com Community
  • Visit Brownells
  • Visit AR15 Builder
  • Visit
  • Visit Site
  • Visit Beachin Tactical
  • Visit
  • Visit Ballistic Advantage
  • Visit Aero Precision
  • Visit Cabelas
  • Visit Faxon
dubya

Back to the 308 platform and have a couple questions

Recommended Posts

Ok... knowing that, I can only come up with two ideas to try and figure it out.

1. try another stripped bolt to see if that works with the gauges properly. (if it does, great you have a winner... if not)

2. your barrel was not reamed properly and you will need to send it back.

 

Share this post


Link to post
Share on other sites
8 hours ago, mrraley said:

Ok... knowing that, I can only come up with two ideas to try and figure it out.

1. try another stripped bolt to see if that works with the gauges properly. (if it does, great you have a winner... if not)

2. your barrel was not reamed properly and you will need to send it back.

 

Well, there's no sending this one back. I already cerakoted the barrel black

Share this post


Link to post
Share on other sites
On 4/11/2019 at 2:51 PM, dubya said:

It's a Rainier Arms Match barrel and it has a modified 308 chamber proprietary to Rainier.

A few companies do this, and Fulton Armory comes immediately to mind, with the "match chamber."  It's not uncommon.  It's not even important in the .308ARs like it is with the .223 Wylde in the AR15s - THAT makes a difference, in AR15s.  In .308ARs, it's not much of a difference.

What you need to do here is call Rainier Arms, and that's why I highlighted that part above.  Ask them what gauges THEY use when checking headspace.  Not kidding on that part.  You can run regular 7.62 NATO gauges through a good barrel, and fail that brand new barrel.  You can run .308 Win gauges through a brand new barrel, and fail that one, too.  It depends more on the gauges that the barrel manufacturer uses, than anything else - and how tight they cut that thing to the "GO" gauge.  Another manufacturers GO gauge might be one-thou different, and it's not gonna work. 

You didn't feed a NO-GO gauge,with this set.  Here's what I'd do - lightly and slowly chamber a spent .308 WIn case.  If it closes on it, you're good.

Or, call Rainier, asks them what gauges they use, buy or find those gauges, and retest.  My $0.02 on it.  Calling Rainier, and finding out that info, though - that's priceless...   :thumbup:

Oh...  ignore everything you were told on that other place - that you left the link to...   There's a bunch of garbage in there, and I stopped reading it all before I got to that page 2.  Your ToolCraft BCG and bolt are fine - they make every BCG that leaves Aero Precision...  and alot more, for many, many other OEM manufacturers...

Share this post


Link to post
Share on other sites

I did email Rainier a few days ago but haven't gotten a response yet. 

Since I cant sleep tonight I decided to see if a spent 308 case would chamber. I tried a couple I randomly picked out of a bag of brass I've been saving and they could have been shot out of my old PA10 or one of my buddies 308s. Either way, none would chamber. My forward assist doesnt work in the M5 upper so I also tried letting the bolt slam home, it still didnt chamber and I had to mortar it out.

Guess I'll be giving Rainier a call on Monday. The gun chambers factory 308 ammo but fails on a Clymer 1.630 GO guage. Now I wish I had bought the Faxon pencil barrel like I originally planned. 

Share this post


Link to post
Share on other sites
On 4/11/2019 at 11:47 AM, dubya said:

I borrowed a set of Clymer 308 Match headspace guages

 

22 hours ago, dubya said:

They use PTG guages

That might be the answer here.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...