Badly dimpled brass - Noveske

[SavageStag]

My brother bought a Noveske N4 off of Armslist and it is having an issue I have never seen or heard of. The ejected brass is coming out with large dimples all over the upper half of the brass. I tried reloads and factory PMC with the same results. I cleaned the chamber really well before we went out but I don't have a borescope to properly check it out.

Anyone have any ideas? I'm baffled.

 

[pupdawg]

Is the gun functioning properly? Could be carbon deposits in the chamber, rust spots, or a bad chamber. If you don't have a bore scope try removing the barrel to see if you can have a look in the chamber.

 

[SavageStag]

It seems to be functioning fine. Unfortunately I don't have the tools to tear it apart. I'm thinking it's some sort of deposits too, although it chambers fine.

 

[Captain Kirk]

Question; do the dimples always show up in the same location on different pieces of brass?

 

[FALex]

Not that you're going to get an honest response, but did he contact the seller? Is it a factory Noveske barrel and did he buy it at a Noveske-type price? If it truly is a 100% Noveske, I'd send the upper to them.

 

[Wyfox]

Severe rust or carbon deposits in chamber. Try running a patch into the chamber and see what color(orange or black)it is after twisting it around some.

 

[bcrich]

My 7.5 AR pistol does that exact same thing.... It functions fine but unburnt gunpowder fouls the chamber every time & causes the dented cases. Seems like your gun is running dirty too ...maybe?? Do you see unburnt powder in the chamber?

 

[rjacobs]

does un-fired, but chambered brass come out looking like that or only fired brass?

 

[MSTN]

Wow! I'll be following this.

 

[GH41]

What does the first case out of a clean chamber look like?

 

[Temp9]

Any oils or preservative greases in the chamber?

 

[Tangodown911]

Tag...I'll be watching too. Can't wait to see what's up here.

 

[brcook03]

If there were deposits that large in the chamber, wouldn't there be scraping or drag marks on the brass caused by the extraction?

Just curious.

 

[maggitas]

Sounds very odd. Like others have said I would clean chamber thoroughly and polish if possible.

 

[DavidAR10]

Sounds like yoozgotz crunchies in your chamber. Best to you.

Montana X-Treme

 

[Ballista One]

Question; do the dimples always show up in the same location on different pieces of brass?

There certainly would if the chamber was damaged.

If there were deposits that large in the chamber, wouldn't there be scraping or drag marks on the brass caused by the extraction?

Just curious.

You'd think there would be.

Unless the OP can produce several more pieces of brass exhibiting the same characteristics there is nothing left to discuss. Why is it these threads ALWAYS start with "my brother" or "my friend"?

 

[bustin]

Looks like it was ejected and then walked on. If there was anything in the chamber that large the cartridge wouldn't chamber to start with.

 

[FALex]

I love these threads..."hey, I have x problem, what do you guys think?"

There never seems to be any follow up from then on...

OP, we'd like to know if chamber was powder-laden, did the barrel fall off, is there even a Noveske rifle producing dimpled brass anymore?

Come on, man, inquiring minds want to know!

 

[leadbullet]

looks like a puppy has been shewing on your brass bud.

 

[hessian]

There was a similar thread some time ago that baffled the hide. the dimples were larger and disrtibuted radially. A man I sold a rig to told me of a similar occurence. His 30/378 Weatherby or some such necked magnum produced dimpled brass for about 80 rounds and then blew up. I suggested that the custom aftermarket barrel had insufficient freebore for a Weatherby and resulted in a pressure spike. What little I know of metal and engineering led me to believe that the over loaded chamber was stretching and allowing gas to enter the chamber causing the dimples . Do that enough and the metal does not return to its original shape and is weakened, hence the catastrophic failure. He agreed. In airplanes they call it "metal fatigue". Get a new barrel.