Rough Chamber ?

[killerapplesauce]

Purchased a Advanced Armament Corp. 16 inch 300aac blackout barrel a while back from brownels. I finally was able to take her out to the range this last weekend. I fired a few round and noticed the empty shell casings where real frosty. Is this normal seems to mean that the chamber is real rough?

[emmagee1917]

That is real bad . I don't think I've ever seen one that bad , even used .
I would guess that the chamber missed the final post-reaming polish or was parkerized .
Other real experts should be along to give you better help .
Chris

[dellet]

Looks like it's a treated barrel that was not cleaned well. Nitride is a salt bath and will leave behind almost a sandpaper finish. Clean it really well with a chamber brush as well as the rifling. That will probably take care of the scuffing.

The big worry is the mark at the base in the first photo.
Is that a cut line from dragging on the barrel extension? it looks like it is inline with the marks on the neck and that would make sense.

If that's the case it is probably just a sharp edge left from machining that will wear or you could polish it some to keep that from happening.

[killerapplesauce]

Thanks guys for the responses. I'll give it a good clean tonight and see how that works out.

[plant.one]

Thanks guys for the responses. I'll give it a good clean tonight and see how that works out.

you can chuck the chamber brush up in a hand drill if you want to speed the process up a bit, but it'll smoke the brush on you.

just a fair warning

[A-Game]

You can also call brownells and report the problem to them before you do something to your barrel that will void the warranty. AAC will also honor its warranty and probably just exchange the barrel so you don't have to screw with it

[Boolit_Head]

While Brownells has the lifetime satisfaction warranty I don't believe the OP said that is where he got it. Using a brush in the chamber probably wont void any warranty otherwise no one could clean it.

[plant.one]

if a brass chamber brush damages a melonite finished barrel.. there was something seriously wrong with that barrel to begin with...

there's virtually no way that a properly finished melonite barrel can be damaged by a brass brush due to the hardness of that melonite layer of the metal.

[dellet]

if a brass chamber brush damages a melonite finished barrel.. there was something seriously wrong with that barrel to begin with...

there's virtually no way that a properly finished melonite barrel can be damaged by a brass brush due to the hardness of that melonite layer of the metal.

If you think a brass brush can't hurt a melonited barrel, you haven't seen one where someone has put it on the end of a drill.

[plant.one]

well ya if you're determined enough you can damage pretty much damn near everything with just about anything else, hence the 'virtually no way'

but as long as you're reasonably cautious, is there really that much of a risk of damage?