RCBS - Trimmer Carbide Cutter Head Neck Sizing Die The sizing diameters are hand-polished Type:300 WSM (50pk) Central so when a cartridge CustNR2420

The sizing diameters are hand-polished with a surface hardness of Rc 60-62 to reduce sizing effort

then choose the caliber

For use with the Co-Ax® Press

then this is pointing to an issue with your reloaded round against SAAMI specifications

The RCBS Pow'r Pull Impact Bullet Puller features a solid one piece body and innovative 3-jaw chuck that firmly grips the case rim

RCBS Trimmer Carbide Cutter Head Neck Sizing Die The sizing diameters are hand polished Type:300 WSM (50pk) Central so when a cartridge CustNR2420 The sizing diameters are hand polished with a surface hardness of Rc 60 62 to reduce sizing effort then choose the caliber