RCBS Precision Mic - $56.99

The Precision Mic Gauge shows you your chamber headspace and bullet-seating depth to 0.001 of an inch with just a few twists. It measures from the datum point on the case's shoulder to the base, giving you spot-on SAAMI tolerance readings. It's indispensable for safe, accurate loads. Available for many popular calibers. Type: Micrometers. - $56.99