Went to thre range fri afternoon as some sub-gunners were leaving, after they left I noticed that the ground was littered with 45 brass, I picked about 150-200 cases, all appear to be once-fired, the head stamp is "cbc"along with "45auto" on top, it is, of course, boxer primed, Who is "cbc"? what does anyone know about this brass? trash? worthwhile? primer pockets crimped?