Three hundred AAC Blackout brass, sizing without the expander ball will even now raise the neck pressure in lots of the latter. For what It truly is worth, sizing brass without the expander ball also goes a great distance towards preserving case necks straight, which generally brings about solid accuracy. https://reloading300blackoutaac94826.boyblogguide.com/37836937/facts-about-300-blackout-projectiles-revealed