A few twists of the Precision Micrometer and you'll know your chamber headspace and bullet seating depth to 0.001 of an inch. It measures from the datum point on the case shoulder to the base, giving you spot on ANSI/SAAMI tolerance readings. This is an indispensible tool for safe, accurate loads that extend the life of your brass and rifle.

Fits:
7mm Remington Magnum