Ok, so I finally got mine done, but have a problem that I do not know how to rectify myself!
The bolt closes and turns on an empty chamber no problem, but with an empty case or a dummy round it does not close all the way! Yes, all cases are to spec. It is a Ballistic Advantage Premium barrel, and guarantees sub moa with match ammo. Even though it will not close all the way, it will grab the case and extract it when I pull on the charging handle. I am about ready to actually cut a case in half and see what happens. When I drop in an empty round, or a dummy round, they fall right out.
I am using a mil spec carbine buffer tube with a Strike flat spring along with a Spike's T2 buffer.
The bolt I am using is aftermarket and it rotates freely. It is fully oiled as well.
Chime in with some ideas please.
ThanksThis message has been edited. Last edited by: Jeff B.,
With 308 AR build you have to match the bolt to the barrel extension. Sounds like you have an AR10 bolt and the BA barrel is DPMS. Check with the mfg of the bolt, it's probably AR10 and not DPMS pattern....
Btw, you can order just the bolt directly from BA to match your barrel.
Phosphate > http://ballisticadvantage.com/308-bolt-phosphate.html
NiB > http://ballisticadvantage.com/308-bolt-nib.html
As a side note, if it I'd mismatched, be glad you didn't fire it as it could have excessive headspace.
I did cut a case in half and it went in further. Too far actually as there was not enuff sticking out for the bolt to grab. Should I look for a .308 go/no go gauge?
Is your bolt AR10 or DPMS format?
Here is the bcg from Gunbroker...
Looks like it is DPMS.
BTW, I could not fire it if I wanted to. The bolt does not close all the way.
I see the mention near the bottom of dpms but i'm still thinking its a compatibility issue.
What sizing die are you using? Is it a 1/4 - 1/2 turn beyond touching to full length size?
Ribs die, but just till it touches. I am gonna try some things tonite.
Mike asked if I had the f/l die set to cam over, I did not. So, set it to cam over hard and did some cases....10. 5 functioned flawlessly and the other five had to be yanked out. Took a couple thousands off the shell holder and reset the die to cam over hard again.
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