The Robert Louis Company, first known
for their popular Shotgun Combo Gauge, has done it again! After
over a year of testing and experimentation, they have introduced
a very handy new measuring device, appropriately named The Boremaster
As the name implies, this compact
tool measures the inside dimensions of any shotgun barrel, from
.410 to 4 gauge, to a depth of six inches. The 6 inch probes are
spring-loaded to produce the same pressure along the walls of the
barrels as the measurements are taken.
is a very helpful and handy gauge to have in your workshop, at a
gun show or even when out shooting. You can check (or double-check)
the chokes in either specific bore diameter or actual constriction,
simply by touching the “0” button.
You can even measure your screw-in chokes in or out of your shotgun
as the actual constriction relative to the barrel bore diameter.
Chamber length is measured by inserting
the probe into the chamber and when the forcing cone is met, that
is the chamber length – read in both inches and metric as
inscribed on The Boremaster.
These measurements up to the 6 inch
depth convey a lot of information to the shooter or potential purchaser,
even though the entire length of the barrel is not measured. And
the compact size of The Boremaster makes it easy to keep close at
For more information on The Boremaster and other
Robert Louis Company Products, call 800-979-9156 or visit www.shotguncombogauge.com.