Powder burns on reloaded casings

[Zombie Steve]

I definitely wouldn't crimp more. It's pretty easy to put a crease in a plated bullet. I generally get away with a taper crimp at .380". Your gun might require a little more.

...and a tenth of a grain of powder probably isn't going to make a bit of difference.

You might try a different powder... something in the medium burn rate range like Unique. Bullseye is one of the fastest out there.

If it runs the gun and it's getting where you want to be in terms of accuracy and velocity, I really wouldn't lose any sleep over it.

[cpapastr]

Thanks Steve!

[paddywagon]

It is very normal. I find that it seems to depend on chamber as to how much. I have a 9mm Colt subgun that the cases are half black when ejected and on several of my HK pistols there is very little discoloration.