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.
Notes:
- 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 calibres and to stick their case through the top end, which is NOT correct.
