But it is sure fun as hell to shoot 500 rounds!! I had fun at least...

When I first got mine I had to work it like a bolt action...It was not fun

What diameter did you increase your gas port hole to? I measured mine the other day and it was .065". Mine is brand new, never been fired yet so I don't know if I have issues......it's been -20 for highs here and I ain't going to the range in that!

You might actually be ok as mine was somewhere along the lines of a .040 I want to say. When you compare to a DPMS at .087 it is still a vast difference. I believe he opened mine up to a .060 or.070 I wanna say. I'll ask my gunsmith and post the diameter when I go to pick up my arsenal ak that he is Parkerizing

That would be awesome if you could do that! I measured mine with a caliper quick and got about .065", if I had a gage pin set here I'm sure it would measure in the .068-.070 range.

I ported mine to almost .080" ... actually drilled at .078125 and then deburred and polished with diamond jewel file. At this port size, my adjustable SLR DA-7c gas block is set to 8 clicks out of 13 with the following components/conditions:
a) Enidine 308 rifle buffer (weighs in at 6oz ... twice as heavy as the stock carbine buffer that weighs 2.95oz)
b) The original MP10 carbine spring
c) Magpul PRS stock with DPMS A2 buffer extension tube
d) no spacer is used with the rifle type buffer
e) CBC 168 grain BTHP and Federal 168 grain Sierra ammo used.

If you expand your gas port, be sure to add weight to the buffer because your rifle will likely fast-cycle. I think Rojo Diablo advised in another post of using old lead fishing weights in the stock carbine buffer body ... which is good, cost effective advice.

So... I stumbled on this thread around Nov 2013 and was happy to know that I wasn't the only one experience problems. All of the advice was sound and I'm happy to know that many were able to resolve their problem. I on the other hand was pretty miffed that this platform was not operating at the specifications as advertised. If the barrel is stamped 762x51/.308 then by Hell, it should work FLAWLESSLY as advertised.

I waited until after hunting season and sent it to the manufacturer. On the repair report it stated they trimmed and polished the chamber. The short stroking was being caused by the 762x51 rounds getting stuck during extraction causing the bolt to not cycle "on-time" or loss of energy during cycling due to extra effort of extracting spent round causing the key to miss the next round...

I'm no armorer but does this make sense to anyone?

Regardless, I have Tatiana back and she is flawless!

S/F
Belicose

It makes no sense at all. If the rounds were so weak as to have extraction issues, misfeeds would be the minimum issue you would have. You would have brass hanging up sideways, and the rifle would be more problematic than it was.

And, the issue is not NEARLY relegated solely to 765x51 ammo. Plenty and plenty of rifles are having issue with top shelf hunting ammo.

The 308AR, by design should have a good margin of error built in for gas pressures. And the BCG will operate on a good deal less pressure than the 308 generates when it is working well.

I have seen squibs cycle AR's of both sizes, 556, and 762. A squib..... that did not even cook with enough gas to fart the round out the barrel had enough momentary pressure to cycle the bolt.

If they fixed it?? Great news. Time to go hunting and be happy again!! What they did to actually fix it??? Don't know, and I suppose so long as it's fixed, one can't ask for much more.

The first thing I notice about this rifle is the action is a little gritty out of the box. I lubed the hell out of it and cycled a bunch of dummy rounds and empty chamber bolt drops. I will admit I did about 500+ before it was nice and loosend up.

IIRC about 15-20 years ago there was a recall on surplus CBC ammo. Some very high pressures and blown up guns. I had a case of it at that time. I believe the importer made it good but it was a long time ago and I'm not certain.

I've heard of that. Unfortunately this was a recent 2010 vintage, it shot fine in everything BUT The savage with no pressure. Brass length was 2.02x+ when I measured, way over max trim spec. So I believe the neck was sticking in the tigher savage chamber.

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