Need some help advice on this one. This brass is on its 4th reload, it's PPU. The ring reminds me of a bulge from a glock. The brass is springy when resized at the bottom of the throw. I don't feel a difference on the inside of the case that would be indicative of a case head seperation, but I've had a few pieces of brass that wouldn't chamber, and they had this ring on them. The dies are clean and have fewer than 100 reloads on them, and these marks are not left on my Hornady brass.
I can't make this hot because I don't have enough posts, but if someone could I'd greatly appreciate it.
i679.photobucket.com/albums/vv151/oaretc/IMG_1309.jpg