Once fired factory ammo brass showing signs of stress?

[CleanShot]

Hello

I'm new to reloading but I've been saving my once fired factory ammo brass for practice loads. I was looking at some of the brass I just cleaned and it looks like it's showing signs of stress after being shot just once.

Can someone please help me figure out if I'm just an stupid newbie or what's going on?

Thanks
Sam

 

[Predator 22]

Is it just discoloration or is there actual damage to the brass? If it's just discolored take a piece of scotch bright to the bad spots and tumble them. If there is a dent or something like that full length size and shoot to fireform back to your chamber. If it's more than a lite scratch I scrap them.

 

[dok7mm]

+1 Without knowing the age of your ammo when fired or how long it's been stored, it's hard to know, but it most likely surface only. It's wise to save brass, but it should be cleaned shortly after firing and stored properly. The powder residue, sweat and finger prints from handling are all corrosive. Hit the spots with 0000 steel wool and then tumble as predator 22 suggested and discard any case that shows a deep scar.

 

[LoneTraveler]

If there is no actual damage to the brass it is usable. Scotch Bright or 0000 steel wool will clean the brass to look better cosmetically. Resembles stains I have seen on brass from loading and shooting in hot weather, And sweat has go on the brass and caused the stains.

 

[CleanShot]

The ammo is just a few months old. It was shot in reasonable warm weather if I recall correctly in the high 80s. I didn't clean it for some time after it was shot maybe like a month. It also may have sat in the tumbler for a few hours before I able to rinse it off. I know cleaners can cause discoloration. If you were to ask me I'd say it's just surface corrosion but because of the length wise streaks I wanted to confirm.

Are you guys recommending the Scotch Brite or steel wool to make sure the brass is fine, for cosmetic purposes, or both?

 

[dok7mm]

When you use the steel wool to lightly clean the discoloration off ( it would take a long time in tumbler) and then tumble it, inspect your brass. Common sense will tell you whether it is fine or needs to be discarded. You will be able to see if there is real intrusion into the case as there appears to be on the case with the long dent in your picture.