If you want the ultimate in hand priming tools - the K&M Primer Deluxe will fit the bill. Benchrest Shooters seat the primer until they "feel" it just touch the bottom of the primer pocket. Consistency is the secret to seating - with the K&M Primer/Gauge you have that consistency. Utilizes Lee Autoprime shellholders (sold separately). Depth adjustable to seat the primer to consistent depths. Comes with both small and large primer holders.FeaturesSingle hand priming allows for the most accurate and consistent reloads possibleAllows for the reloader to seat by "feel"Utilizes Lee Auto Prime Shell HoldersExtra fine threads for minimal adjustment