media residue on cartridge neck

Spiny · January 10, 2016, 06:56 PM

I'm using corncob media (rouge) in a tumbler with rifle brass. Polishes the bulk of the cases just fine. But, I keep getting left with this hard powdery residue around the case neck. If I was guessing it might be where there was carbon on the case. Has anyone seen this? More to the point how do I get rid of it without hand cleaning each piece of brass?

Ozzieman · January 10, 2016, 07:15 PM

What caliber.
Bolt or semi?
And photos would help.

Spiny · January 10, 2016, 07:24 PM

bolt, 270 and 22-250

Spiny · January 10, 2016, 07:29 PM

This is a picture of the offending gunk

Fotheringill · January 11, 2016, 10:07 AM

Tip to avoid what you see in your picture-

Use 0000 steel wool and wipe the neck after taking each shot at the range or certainly before putting it into your tumbler.

As I was told either here or another forum, that powdery residue is an abrasive, no matter how weak it might be. If it is on the outside, it is on the inside. Do you want this abrasive going down your barrel when you next fire and do you want it and the powder or whatever it is adhering to going into your die?

alexcue · January 11, 2016, 01:21 PM

Wowzers! What is that stuff?

Spiny · January 11, 2016, 02:13 PM

It is a hard residue from the rouge compound. It comes off with some bore solvent and a stiff rub with a cloth. But one case at a time is very time consuming. I was wondering about and ultrasonic bath, at least then I would cleaning the inside as well and reduce the barrel's exposure to this stuff.

alexcue · January 11, 2016, 02:23 PM

ahh gotcha!

I just use NuFinish and dryer sheets in mine and they come out perfect after a few hours. The NuFinish also makes them slide into the dies a lot easier. Never have any chatter when I resize.

Personally i don't worry about the inside as to how they look.

January 10, 2016, 06:56 PM	#1
Spiny Junior Member Join Date: August 17, 2014 Posts: 5	media residue on cartridge neck I'm using corncob media (rouge) in a tumbler with rifle brass. Polishes the bulk of the cases just fine. But, I keep getting left with this hard powdery residue around the case neck. If I was guessing it might be where there was carbon on the case. Has anyone seen this? More to the point how do I get rid of it without hand cleaning each piece of brass?

January 10, 2016, 07:15 PM	#2
Ozzieman Senior Member Join Date: December 14, 2004 Location: Northern Indiana Posts: 6,117	What caliber. Bolt or semi? And photos would help. __________________ It was a sad day when I discovered my universal remote control did not in fact control the universe. Did you hear about the latest study.....5 out of 6 liberals say that Russian Roulette is safe.

January 10, 2016, 07:24 PM	#3
Spiny Junior Member Join Date: August 17, 2014 Posts: 5	bolt, 270 and 22-250

January 11, 2016, 10:07 AM	#5
Fotheringill Senior Member Join Date: August 26, 2014 Posts: 114	Tip to avoid what you see in your picture- Use 0000 steel wool and wipe the neck after taking each shot at the range or certainly before putting it into your tumbler. As I was told either here or another forum, that powdery residue is an abrasive, no matter how weak it might be. If it is on the outside, it is on the inside. Do you want this abrasive going down your barrel when you next fire and do you want it and the powder or whatever it is adhering to going into your die?

January 11, 2016, 01:21 PM	#6
alexcue Senior Member Join Date: July 28, 2015 Location: Los Angeles, CA Posts: 134	Wowzers! What is that stuff?

January 11, 2016, 02:13 PM	#7
Spiny Junior Member Join Date: August 17, 2014 Posts: 5	It is a hard residue from the rouge compound. It comes off with some bore solvent and a stiff rub with a cloth. But one case at a time is very time consuming. I was wondering about and ultrasonic bath, at least then I would cleaning the inside as well and reduce the barrel's exposure to this stuff.

January 11, 2016, 02:23 PM	#8
alexcue Senior Member Join Date: July 28, 2015 Location: Los Angeles, CA Posts: 134	ahh gotcha! I just use NuFinish and dryer sheets in mine and they come out perfect after a few hours. The NuFinish also makes them slide into the dies a lot easier. Never have any chatter when I resize. Personally i don't worry about the inside as to how they look.