300 AAC Blackout brass, sizing without the expander ball will even now increase the neck tension in tons of the latter. For what It truly is worthy of, sizing brass with no expander ball also goes a good distance towards maintaining scenario necks straight, which normally ends in solid precision. https://griffineuhrb.blogdiloz.com/37647961/300-blackout-brass-things-to-know-before-you-buy