That’s a fantastic question, Ted. I’m undecided. Here is a pair samples of what I’ve read in different areas within the Federal 210 vs Federal 210M variations: Any way I've discovered a slight edge in accuracy and a rather more reliable body weight Along with the BR2s while I don't https://large-rifle-primers-winch01234.csublogs.com/38516274/facts-about-federal-ar-match-primers-revealed