Description

L.E. Wilson has been making precision reloading tools for over 80 years. The Case Length Headspace Gage
allows reloaders to measure case length from the base of the cartridge
to the shoulder, as well as the maximum case length. This process shows
the reloader if ammunition is being produced within SAAMI specifications.

Technical Information

Material: Steel
Features: Precision Machining
Notes:

• This is a one-piece, non-adjustable cylinder-type gage for checking
  fired and resized cartridge cases for cone-to-head and overall length
• Used to compare cartridges against the minimum SAAMI chamber dimensions
• The item description will indicate if the headspace gage is Adjustable

Instructions:

• Drop a fired case into the gage. Take a measurement on headspace.
  This can be done with either a depth micrometer or caliper (Depending on
  if the case is sitting high or low in the gage). If the case sticks
  out past maximum headspace the firearm probably has a larger than
  average chamber. The gage can still be used because it is being used to
  determine how much resizing is required.
• Now once the initial measurement is taken, slowly dial in the full
  length sizer until there is a 0.001 to 0.002 drop in headspace. This
  will give the measurement to resize the case just below the chambers
  headspace in the firearm being reloaded for, giving a more accurate shot
  and saving brass by not causing it to be overworked.
• Once the brass has been sized, set the brass in the gage and set the
  gage on a flat surface with the head side facing down. Now look across
  the top of the gage, this give the maximum and minimum for trim length.