Wilson - Case Gauge Depth Micrometer Eyepiece The "50 BMG" shellholder is

The "50 BMG" shellholder is a specific shellholder to suit cartridges of this type (50 BMG and similar can only work with the Mark II machines)

protects against rust and corrosion

10 grain accuracy

BULLETSEEKER MACH 4

Wilson - Case Gauge Depth Micrometer Eyepiece The "50 BMG" shellholder isEvery reloader should know exactly how much your Full Length Sizing Die is pushing back the shoulder. With the NEW Case Gage Depth Micrometer you can do just that! It has never been easier to measure you cases headspace before and after sizing. The Depth Mic allows you to slip the micrometer perfectly over the top of the gage with your case inserted into the gage and take a measurement. Graduations of . 001 comes with a Gage Block. One size works for