L.E. Wilson Case Trimmer Neck Reamer, 6mm Diameter (.2455-.246 Finished Diameter) Cartridge_38-40 WCF The Primer Pocket Reamer makes

The Primer Pocket Reamer makes crimped

303 Sectional Density 0

219 Sectional Density 0

380 Ballistic Coefficient G7 Sectional Density 0

Simply put

L.E. Wilson Case Trimmer Neck Reamer, 6mm Diameter (.2455-.246 Finished Diameter) Cartridge_38-40 WCF The Primer Pocket Reamer makesThick necks can cause high chamber pressures and erratic shooting. Neck reamers remove excess neck material to ensure adequate clearance exists between the case neck and the chamber. Also, these reamers can be used when forming wildcats from a parent case. Reamers are used in the trimmers in place of the trimmer cutter. Standard reamers are sized for use on fired, unsized cases. Special sizes can be ground but will extend lead time. Knob style handle