Author: Goosic
Subject: Reloading 303 with crimp
Posted: September 13 2023 at 9:16am
Many years ago I started using a ball expander from a 308W Die Set because I was shooting .308" 168grn BTHP loaded into 303B cartridge case for competition purposes. When reloading now using .311", .3115", or 312" projectiles, I will use that expander ball in a RCBC Neck Sizer and then run the case into my Lee Collet Neck Sizer twice, turning the case 180° after the first pull. It helps in negating any unnecessary runout.
Subject: Reloading 303 with crimp
Posted: September 13 2023 at 9:16am
Many years ago I started using a ball expander from a 308W Die Set because I was shooting .308" 168grn BTHP loaded into 303B cartridge case for competition purposes. When reloading now using .311", .3115", or 312" projectiles, I will use that expander ball in a RCBC Neck Sizer and then run the case into my Lee Collet Neck Sizer twice, turning the case 180° after the first pull. It helps in negating any unnecessary runout.
Be careful not to buckle the shoulders of the cases...