I ain't never seen this before

[JBS]

I loaded these rounds last night and fired them this morning. 38 Grains of H-380, Nosler 52 Grain HPBT, Winchester LRP, Clean cases. Rifle Brand new Savage 12BVSS 22-250. I've been reloading for nearly 30 years and never have I seen this on a case. Totally corroded necks and large areas of black discoloration and round black spots. The unfired rounds are what they looked like before firing. I didn't use any chemicals on the brass or in the tumbler...Lyman Treated Corn Cob Media. Used the exact same method during the reloading process that I have used for many years. I have reloaded the brass a couple of times. WTF???

[tamalpias]

never seen that before either bud, looks like a high sulfur content on the powders. I would call the manufacturer with the lot number and ask if there has been other complaints. At the very least you will get their attention and some feedbacks.

[Sideline Shooter]

You said this was a brand new rifle. Did you clean this rifle before shooting it? I have seen this greenish color on the muzzle of rifles, usually from copper build up. The rifle could have some kind of preservative while it's sitting in the box. Try cleaning it (again) and shoot it again.

sideline shooter

[Beelzy]

Looks like ammonia attacked that brass.

Throw them out and clean the crap out of the barrel chamber.

What lube did you use??

[Fjold]

How old is the H380? It could be breaking down but I suspect that something got into your cases and contaminated them. How was the performance of the load? Did you switch to mercuric primers? Did you get the brass from a different source? My first thought was ammonia from a bore cleaner.

[JBS]

I cleaned it with JB Bore Paste...I don't believe there's any ammonia it it. I forgot to mention, the inside of the cases are the same as the outside. And this was instantaneous upon firing. I've cleaned the rifle again, after shooting, paying special attention to the chamber and throat. I've had the powder a couple of weeks, and I don't think it was on the dealers shelf for too long...seeing as how powder disappears from the store so fast, nowadays. It's GOT to be a powder problem or the inside of the cases wouldn't be all green, too. I thought about ammonia residue, but where did it come from? I'm going back out next Saturday, and do more research (shooting). I'll get to the bottom of it. I also sent this post and photos to Hodgdon, as Tamalpias suggested.

[anyracoon]

Any chance you have some powder from a different lot? Try some and see if you come up with same problem. Perhaps try your reloads in a different rifle also.

[TKM]

Wow, that is beyond weird.

Try an experiment with the powder and some clean brass, see if it does that when poured out on a piece of metal in your bbq or somewhere safe.