A few twists of the Precision Mic and you'll know your chamber headspace and bullet seating depth to 0.001 of an inch. The Precision Mic measures from the datum point on the case shoulder to the base, giving you spot-on SAAMI tolerance readings. An indispensable tool for safe, accurate loads that extend the life of your rifle brass.
Specifications and Features:
RCBS Precision Mic
.223 Winchester Short Magnum
Headspace and Bullet Seat Gauge
Determines chamber headspace and bullet seating depth to 0.001-inch