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DESCRIPTION

L.E. Wilson Cartridge Case Gauge 357 SIG

Technical Information:
Material: Steel

Precision Machining

-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

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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