L.E. Wilson Case Length Case Gage
The L.E. Wilson Case Length Gage measures the Min/Max cartridge case length, a critical dimension for reloading straight walled cases.
This Gage Does NOT Measure Body Diameters.
Set the cartridge case on a flat surface. Then slide the case gage over the top of the case and the use a straight edge to on the top of the gage to assess case length.