Need help with new AR build


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SATX man
July 23, 2007, 10:00 PM
HI everyone I going to build another AR rifle this time a 20" CMMG. The question I have is there any advantage over a crome lined barrel compared to a stinless steel barrel?

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DnPRK
July 23, 2007, 10:36 PM
Stainless has the capability to be a more accurate barrel if machined properly. That's why the benchrest guys use stainless in their quest to shoot 0.10" groups. Chrome works well for military use where a soldier/Marine may not get a chance to clean his bore often.

Bartholomew Roberts
July 24, 2007, 07:46 AM
I've been trying to answer this question myself and haven't come up with a good answer yet. Best I can tell, chrome may have a tiny longevity and reliability advantage when used in high-heat shooting. Stainless steel on the other hand has a small accuracy advantage.

Canuck-IL
July 24, 2007, 12:46 PM
So, is it fair to rank chrome-moly has middle of the road...a little better lifespan than SS but also somewhat more accurate than chrome lined? A compromise solution...?

/Bryan

Bartholomew Roberts
July 24, 2007, 01:40 PM
Well to be fair, the accuracy is more a function of the time and attention given the barrel than the materials. There are several examples of chrome-lined barrels with excellent accuracy. The degree of difference in accuracy is so small you'll never see it without a rest or other extremely stable platform.

On the other hand I don't know that the claimed longevity difference is all that noticeable either.

Canuck-IL
July 24, 2007, 01:59 PM
But the expected longevity is more easily discerned, right? So IYO would the order be (assuming comparably hot loads), chrome, chrome-moly, SS as max to min expected life?
/B

Bartholomew Roberts
July 24, 2007, 10:04 PM
That sounds about right; but based on the anecdotal evidence I have so far, I would expect the longevity difference between the top and bottom to be about 2-3k max.

Canuck-IL
July 25, 2007, 07:43 AM
Good to have an informed opinion - thanks!
/B

SATX man
July 25, 2007, 08:09 AM
Thanks everyone I am going to be getting a crome lined barrel instead of the SS one. Has anyone herd of a company called Sabre Defense?

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