L.E. Wilson Case Length Gauge for 357 Magnum NEW!! CLG-357M

L.E. Wilson

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L.E. Wilson
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L.E. Wilson


Case Length Gauge 



FOR: 357 Magnum

The WILSON CASE LENGTH GAGE is a one-piece, non-adjustable cylinder-type gage with milled surfaces on one end for checking minimum and maximum overall length of rifle and pistol cases having no shoulder.

It is available in the following calibers: 32-40, 38-55, 375 Winchester, 444 Marlin, 45-70, 458 Winchester Magnum, 38 Special, 357 Magnum, 44 Magnum, 44 Special, 45 Colt and 45 Auto.

This CASE LENGTH GAGE is different from and should not be confused with the standard WILSON CARTRIDGE CASE GAGE which checks both overall length and cone-to-head length of rifle cases such as 30-06 which have the more usual profile of tapered body, shoulder and neck.

If cases have been fired and resized many times, some will be found to be over maximum length.

Unless trimmed back to normal length they may bottom in the chamber and in extreme examples may be forced partly into the throat or ball seat, causing pressure variations and consequent inaccuracy.

Perfection in crimping pistol cases can be attained by watching length changes and trimming back uniform length and squareness with the WILSON CARTRIDGE CASE TRIMMER.

The WILSON CASE LENGTH GAGE gives you a safe maximum and practical minimum length to achieve by trimming.


  • Allows reloaders to easily identify cases that are beyond maximum length
  • To use these case length gages, which are for straight walled cases with no taper and no shoulder, put an empty case through the flat end/ bottom end of gage, and sit the gage with case inside on a flat surface to get an accurate length reading. The mouth of the empty case should be in between the two steps for ideal case length. If the mouth of the case is at max or top of the case length gage, the reloader needs to trim.  Many reloaders think that this is a Case Gage for bottled-necked calibers and to stick their case through the top end, which is NOT correct.



All of our products are BRAND NEW in the box; and contain all of the parts,

materials and documentation.

You can expect and will receive prompt delivery of your item.

We will ship your order within ONE DAY!

We are unable to accept returns on used, fitted, or altered parts.
Returns must be in new, unused condition and in their original packaging.