For those with the tools and the skill to use them the L.E. Wilson Case gage is a precision tool capable of measuring the length of the case from the head of the case to the shoulder of the case in thousands. The limits of a reloader restricts the use of a Wilson case gage to a ‘drop-in’ gage.
Nomenclature, Wilson describes the straight edge as ‘the steel rule’, the steel rule is the small ruler stuck in the pocket of a machinist, I have straight edges, one is a set-up table, the other is anything with a straight edge and can be checked on a set-up table with the companion tool to the press the feeler gage.
With the Wilson case gage, a straight edge and feeler gage the length of the case can be measured from the ‘DATUM’ of the gage in thousands, the gage can also be used with a height gage, depth gage and the dial caliper.
The Wilson case gage has limits, the user.
F. Guffey