Testing at AMU Fort Hood
Hood. Officer in Charge of the
Advanced Marksmanship Unit (AMU) was CW3 Edward Isenberg.
Chief Isenberg was
responsible for making sure the 160 NM-M14 National Match rifles were
accurate and met or exceeded National Match standards. Only the most
accurate rifles were used in competitions at state and regional matches.
The rifles were
also used for the standard National Match course of fire at matches
conducted throughout U.S. Army facilities in the U.S.; in addition, the
NM rifles were used by different teams from Fort Hood for the national
matches at Camp Perry.
Chief Isenberg used
a single Weaver T-10 Scope and Bassett Standard Scope Mount unit to test
160 rifles for accuracy, three times a year for 2 years.
He shot four
5-round groups, slow fire, at 100 yards. If the accuracy was
acceptable, the rifle was marked acceptable for match use. He removed
the scope and mount unit and put it on the next rifle and shot another
four 5-round groups, and so on with 160 rifles. Three times a year for
two years. Ammo used was Lake City NM M118 173grain bullets.
The Bassett mount
was the most useful tool used to determine the accuracy of the rifles.
By using the T10 Weaver and the Bassett mount, he eliminated many
possible shooter errors which resulted in a truer test of the rifles’
Doing the math,
that comes to 19,200 rounds against the same scope and mount unit. The
mount never showed signs of shifting or wear on the action.
runs, it was determined that 22 inch-pounds to be sufficient to hold the
mount with no shifting and yet not distort the rifle action or
compromise accuracy. This is why Bassett Machine recommends using a
consistent installation of 22 inch-pounds.
Chief Isenberg, now retired military, is the owner of Just Glocks, Inc.
He can be contacted at
or visit his web