Frankford Arsenal Cartridge Overall Length Gauge

If you have a cleaning rod and a set of calipers, you can
now determine the optimum OAL for any bullet in less than two minutes. This
simple kit consists of two clamps that easily attach to any cleaning rod, ¼” in
diameter or less. Simply insert a cleaning rod into the bolt face and install
one clamp at the end of the bolt face. Then remove the cleaning rod and
insert a round into the chamber. Next, touch the cleaning rod end to the back
of the round and attach the second clamp at the end of the bolt face. Finally,
remove and measure the distance between the two clamps or use as a gauge to
check the seating depth set-up during your reloading sequence. It works on all
rifles.