Ive got some brass with 2 firings on them that have a ring around the base, these are 3006, about half of what I have are like this. This is win and fed brass from factory ammo. Do these need to be thrown out? I am not loading to max at all. Primers are not cratered or pierced. No markings on the head stamp. Read this forum all the time and get a lot of info but dont post much. Thanks for any help.