ARCOMP & Carbon Rings

[232593]

Does anyone know if ARCOMP 5.56 loads are more or less prone to create carbon rings in AR rifles than other powders?

 

[Ex E6]

Does anyone know if ARCOMP 5.56 loads are more or less prone to create carbon rings in AR rifles than other powders?

Well you could compare ingredients with other suitable burn powders . MY vote says NO . Sometimes case necks become small of Diameter especially with SB Dies and Don't close the chamber wall gap quick or efficiently enough .

https://www.alliantpowder.com/downloads/sds/Reloder_Series_SDS.pdf

 

[ma smith]

AR comp definitely shoots 'dirty' in the sense that, in my experience, there's alot of 'stuff' to patch out out. But IIRC its partly by design. Self cleaning ingredients sometimes work that way. I would not shoot tons of AR comp without cleaning it. The seems sticker or someting to clean than Varget or XBR, but like I said I believe its in part due to "anit-fouling" ingredients etc.

I'd be interested to hear other peoples or more definitive views on it.

 

[Evintos]

Hard, black carbon, not more prone. AR Comp is "dirty" and it's a combo of mostly flash reducing additives and a mild decoppering agent. The decoppering agent amount isn't a lot and is more like a slow down copper build up rather than completely eliminate copper build up. The residue that gets left behind is a powdery grey rather than a dark black and carbon rings are significantly less of an issue with AR Comp compared to something like Varget.

 

[232593]

Did I remove most of it?

 

[Ex E6]

Carbon Bore fouling can be caused by a number of things , mainly by inconsistent or spiked Pressure .It will degrade accuracy as the heat as well as pressure transforms the fouling into a near ceramic type coating . Difficult to remove ,yet can be done chemically ,as well as by polishing . Bore Tech carbon remover and or Simichrome polish are effective .

It also has to do with temperature-insensitive powders ,as they contain additional additives which
aids in the problem .

One can try and stay ahead of the removal chore ,by cleaning more often . Please remember TOO MUCH CARBON can spike PRESSURE !.

Carbon ring in the rifle bore can affect accuracy, pressure and velocity. It's prone in cartridges with large case capacity and small bore diameter. Carbon ring is best identified with a bore scope and will appear as dark or cracked areas about 1-2" beyond the lede of the bore. If you're encountering this , say less than 150 200 rounds ,you're probably better off changing power or most certainly the charge .

I'll add one more tip ,patch your bore with Acetone or lacquer thinner BEFORE range time . Many people forget to remove Hoppe's or any other oil based bore protective . Because burning that ADDS to Carbon build .

Consider a combustible engines valve train or pistons . Carbon build up poor fuel quality or excessive oil burn .