The RCBS 90378 Primer Pocket Uniformers are expertly crafted with durable carbide cutters. Designed to ensure that primer pockets are cut to the correct SAAMI depth specifications, these tools clean out built-up carbon residue from previous firings and square the bottom of the primer pocket with respect to the case head.
This uniforming step is important because variations in primer seating depth can change how the firing pin strikes the primer, producing inconsistent ignition. Made with high-speed carbide cutters, this tool trues the primer pocket wall and bottom, delivering the precision essential for reliable handloaded ammunition.
Designed for use with the RCBS Trim Mate Case Prep Center, the 90378 is sized for large rifle cartridges. this uniformer removes crimp residue and ensures consistent primer pocket geometry across your lot.
