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3 Comments
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George 1
5 years ago
I have a Criterion barrel (CL) in one of my builds. It is indeed very accurate. It is not my most accurate barrel though. The AR barrel that is my most accurate is a La Rue PredatAR. They are stainless. I have a few of them and they are very consistent. The Criterion is however more accurate than two of them.
I should state that my definition of accuracy is that a rifle must shoot the cheap ammo well. That is at least 2.5″ MOA from a rest for the XM 855 or XM 193. Not necessarily both for one rifle. I do not normally shoot expensive ammo. The La Rue barrels and the Criterion barrel that I have will do that.
I did shoot some Hornady Black 5.56 though a few of my rifles. One of the La Rue equipped builds shot a .55 inch 5 shot group @ 100 yds. The Criterion equipped rifle did not do quite that well but it did shoot just over an inch. A good shooter could no doubt do better. So not a scientific test at all.
Like I said I have never tried very hard to find a load that would shoot the best in my guns.
Brad
5 years ago
Aerospace Machinist and 07 FFL here. They are correct about the relatively new processes. Also the older processes required an Embrittlement Relief process. They’ve been able to skip that step in some cases,which is thermal. There’s also a couple different types of chrome plate. Thin Dense Hard Chrome is a very cool new process. Super tough, smooth, and has a lubricity quality to the surface finish. I haven’t seen that process used on commercial barrels yet, but I know it’s being used on some military barrels.
Gerald Schwartz
5 years ago
When you begin to see serious-bench rest people successfully using the treatment, then you can consider that the process either maintains or enhances accuracy. Short of that, any evidence is…anecdotal.
This article is filed under the category(s) AR-15s and was published March 30th, 2021 by Herschel Smith.
If you're interested in what else the The Captain's Journal has to say, you might try thumbing through the archives and visiting the main index, or; perhaps you would like to learn more about TCJ.
I have a Criterion barrel (CL) in one of my builds. It is indeed very accurate. It is not my most accurate barrel though. The AR barrel that is my most accurate is a La Rue PredatAR. They are stainless. I have a few of them and they are very consistent. The Criterion is however more accurate than two of them.
I should state that my definition of accuracy is that a rifle must shoot the cheap ammo well. That is at least 2.5″ MOA from a rest for the XM 855 or XM 193. Not necessarily both for one rifle. I do not normally shoot expensive ammo. The La Rue barrels and the Criterion barrel that I have will do that.
I did shoot some Hornady Black 5.56 though a few of my rifles. One of the La Rue equipped builds shot a .55 inch 5 shot group @ 100 yds. The Criterion equipped rifle did not do quite that well but it did shoot just over an inch. A good shooter could no doubt do better. So not a scientific test at all.
Like I said I have never tried very hard to find a load that would shoot the best in my guns.
Aerospace Machinist and 07 FFL here. They are correct about the relatively new processes. Also the older processes required an Embrittlement Relief process. They’ve been able to skip that step in some cases,which is thermal. There’s also a couple different types of chrome plate. Thin Dense Hard Chrome is a very cool new process. Super tough, smooth, and has a lubricity quality to the surface finish. I haven’t seen that process used on commercial barrels yet, but I know it’s being used on some military barrels.
When you begin to see serious-bench rest people successfully using the treatment, then you can consider that the process either maintains or enhances accuracy. Short of that, any evidence is…anecdotal.