RCBS Trim Mate Primer Pocket Uniformer Small Rifle/Pistol

Primer pocket uniformers are designed to ensure that primer pockets are cut to the correct SAAMI depth specifications, cleaning out built up carbon residue from previous firings and squaring the bottom of the primer pocket with respect to the case head. This step is important as variations in the seating depth of the primer can change how the firing pin strikes the primer producing inconsistent ignition. Please remember that Large Rifle and Large Pistol are two differnt depth primer pockets, whereas the Small Rifle and Pistol primer pockets are the same.