Is my brass okay?

[41 Colt]

I loaded these 15 cases with 777 and shot my Colt SAA last week. I cleaned the gun when I got home but thought 777 wouldn't hurt my cases based on what I read on Hodgdon's site. I looked at them yesterday and they looked terrible. So I cleaned them with soap & hot water and they still have this green stuff in them. The outside looks a bit better. The case at the very back I was able to remove some of the green stuff with a nylon bore brush. Are these cases still useable?

Also, the case off to the left has a large split in it I didn't notice until I cleaned them.

This is all brand new, first time fired, Starline brass.

EDIT: Looks like a 50/50 vinager & water bath will fix it.

 

[Short Knife Johnson]

Yikes. I've never used Triple 7, but when I get home I run anything I've fired with holy black or Pyrodex through my ceramic media tumbler. Those things are the best. I used to soak in soapy water, then tumble in corncob media for the longest time. That wreaked havoc with the bowl and media. The cases never failed on me, but they built up quite a hard film by the time I bought that Thumbler. As for the one case failure, as a long time shooter of .44-40, I've had the odd piece of new brass fail. This is due to the thinner than usual case wall with the old, originally meant as BP cases. I personally don't worry about it - just promise me you won't reuse the case. Just give them a long, hot bath in soap or vinegar and water, then scrub. They should be salvagable.