Redding - 223 Rem Instant Indicator w/Dial Crank Handle SAAMI Min Chamber specs are

SAAMI Min Chamber specs are slightly LARGER than Max Cartridge

trapped air and lubrication from damaging your cases or die components

lubesizers

When you lock a case in one of our Case Trimmers

Quality brass

Redding - 223 Rem Instant Indicator w/Dial Crank Handle SAAMI Min Chamber specs areThe Redding Instant Indicator Comparator with Dial is useful for quickly comparing headspace and bullet seating depths within 0. 001 of an inch. The headspace measurement is from the case shoulder to the base. This information is critical for setting the sizing die to achieve the precise amount of shoulder bump. To compare bullet seating depths simply insert a standard Redding sizing bushing of the proper bore diameter for the caliber you are using.