They are used for the "Non Toxic" line of ammo for indoor range shooting. Fed, Win, Speer, and another company that I can't remember off the top of my head load smalls in ACP's. HATE it! Throws off my timing when I am loading....my best is 1000 45 ACP's in 40 minutes on an RL1050! Save them and reload them with small primers. You have to swage the primer pockets as they are crimped in like military ammo.
There are no accidents, there is only ignorance, mechanical failure, or "ACTS OF GOD"! I load 3000-5000 rounds a day, 6 days a week!