L.E. Wilson Case Length Headspace Gage 50 BMG

Product #: 472914 L.E. Wilson #: CG-50BMG
$45.99
Status:
Date expected in stock: 06/24/2013
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Product Information

These gages measure the length from the base of the cartridge to the shoulder, as well as maximum case length. This process shows if your rifle ammunition is being produced within industry 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
  • Minimum headspace dimension 3.1332"
  • Maximum headspace dimension 3.1392"
  • Maximum OAL 3.925"
    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.
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