RCBS Precision Mic .338 Winchester Magnum Headspace and Seating Micrometer

Precision Mic Features With few twists of the Precision Mic reloaders can determine chamber headspace and bullet seating depth to 0.001 inch. The Precision Mic measures from the datum point on the case shoulder to the base giving reloaders spot-on SAAMI tolerance readings. It s an indispensable tool for safe accurate loads that extend the life of rifle brass. Precision Mic Specifications Determines Fired Case Headspace Checks Head Space to SAAMI Tolerances Micrometer Style Reading Caliber: .338 Winchester