Not really sure. All cast at the same time, then sized, then coated and sized again. All of them loaded on a single stage and powder weighed out in a Hornady electronic powder dispenser. I have had a couple tumble out of an 8” barreled AR-9, and a Glock 17 gen 3, and a time or 2 from one of my Range Officers. What’s weird is they were still fairly accurate.