RL550B Primer Seating Depth

Oct 6th, 2016
On the Dillon Precision RL550B the design of the head of the primer seating punch allows seating a primer up to .009" below flush. You can verify this by pushing forward on the handle with no primer in the cup, and a deprimed case in station 1. The punch will stick in the primer pocket. If you are having issues with primer seating depth insure that the shellplate is properly tightened as a loose shellplate can result in inadequate primer seating depth.

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