RCBS Precision Micrometer .243 Win - 88305

The RCBS Precision Micrometer measures chamber headspace and bullet seating depth to 0.001-inch accuracy, reading from the datum point on the case shoulder to the base for SAAMI tolerance compliance. This precision measuring tool helps reloaders achieve safe, accurate loads while extending the life of rifle brass. Essential for handloaders who demand consistency and repeatability in their ammunition.