Hi. I am VERY new to reloading. Have had the stuff for a few years, but no room to set it all up. So, I just got it set up, and have cleaning brass. I did a bunch of 30/06 brass, and a few of them had this corrosion, or whatever it is on them. These have been in the tumbler for probably a couple hours. All the rest of it looks great. Just not sure if this is just cosmetic or if it will affect them structuraly (sp?). They feel smooth if you run a finger nail over the spots. Doesn't feel pitted or anything.
Thanks for your time guys!