If you want the ultimate in hand priming tools - the K&M Primer/Gauge will fit the bill.
Benchrest shooters seat the primer until they feel it touch the bottom of the primer pocket.
Consistency is the secret to seating - with the K&M Primer/Gauge you have that consistency.
This precision instrument employs a dial indicator ensuring that each primer is seated the precise depth required.
Precise primer seating without this precision instrument cannot be accomplished.