RCBS Precision Mic Cartridge:204 Ruger It contains ball bearings to

It contains ball bearings to ensure years of smooth rotation and function

4 Solid Copper-Alloy Construction

Bullet Weight Suitability: 180 Grain

458 Bullet Weight 250gr Bullet Style MonoFlex Flat Base Ballistic Coefficient G1 0

RCBS Precision Mic Cartridge:204 Ruger It contains ball bearings toA 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. Features: Determines chamber headspace and bullet seating depth to 0. 001 inch Measures from the datum point on the