Off the top of my head I would have said it was just the head stamp to let you easily ID heavier loaded cartridges, but been wrong on the 45acp.
Wouldn't matter to me as I use both types and load for what I need, just mark the box clearly.
Thanks to Deputy we got the straight skinny.
Wouldn't matter to me as I use both types and load for what I need, just mark the box clearly.
Thanks to Deputy we got the straight skinny.