Question about the discoloration on the interior of this brass

[USMC88-93]

It the different color discoloration on the interior of this brass due to the different chemical nature of the powders used. Some are green, some are rust colored

Is it possibly from some having corrosive primers and others not?

How clean do you need to worry about getting the interior of your brass when they finally get reloaded.

These were all thrown in a tumbler in corn cob (many months ago), but they all still had their primers in. For the most part they all still have the primers in as I only recently have began to buy the reloading equipment I need to de prime and resize etc etc.....
http://img.photobucket.com/albums/v651/PhotoTWB/brassneck.jpg
http://img.photobucket.com/albums/v651/PhotoTWB/cleanedcases.jpg

[HunterCO]

Would guess it is the difference in the powder. I have never seen any cases red like that.

As far as how clean it's not a big deal those are fine. The only thing I ever clean well is the primer pockets. I always resize-deprime my brass before I tumble it.

Maybe Hoser will have some ideas he does a ton of reloading.

[USMC88-93]

Yeah I would have de-primed them, but I have not bought all my reloading goodies yet.

[Hoser]

Its just a mixture of different priming compounds, powder and how the residue reacted with your media. Dark green or a build-up of green is bad. Toss it if it looks like that inside or out.

To get them really clean use an ultrasonic cleaner.

The only time I clean primer pockets is when I start shooting rifles past 600 yards. Inside of that its the loose nut behind the scope that missed. Handgun brass primer pockets? Never.