I'm new to ARs. I notice that the top ⅓ of the 5.56mm cases I've used are a different color than the lower ⅔. I just found some Speer Lawman 5.56mm ammo and they, too, show the color change. I'm guessing it's a heat treatment of some sort, but I'm no metallurgist. Can someone explain the color difference, please? Why don't .223 shells have the same?
I'm assuming these cases can be reloaded without issue. Yes, I know I'll have to remove the crimped primers.
That will be my next question. There seem to be MANY different opinions and techniques for removing the crimp.