Description Lyman Case Trimmer Pilot #20, 20 Caliber (204 Diameter). Lyman Case Trimmer Pilots are required when trimming cases with the Lyman Case Trimmer. The appropriate sized pilot lines the case head square to the cutter. yman Item # 7821981 WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.
