Three hundred AAC Blackout brass, sizing without the expander ball will however raise the neck pressure in lots of the latter. For what it's worth, sizing brass without the expander ball also goes a good distance toward holding case necks straight, which frequently results in solid accuracy. We also use https://300-aac-brass02087.therainblog.com/36521203/helping-the-others-realize-the-advantages-of-300-aac-reloading