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|  MIL-R-1296F(AR)
finger-piece of the safety device and exerted in a line parallel
to the line of movement of the finger-piece. The test shall be
repeated with the safety device in the safe position. For each
test, the safety must move from its initial position within the
range of force specified in 3.3.2.
4.5.4 High-pressure resistance and headspace tests. The
rifle shall be tested by firing one high-pressure test cartridge
in each rifle. After proof firing, rifles shall be visually
examined for cracks, deformations and other evidence of damage,
and cartridge cases shall be visually examined for bulges,
splits, rings and other defects caused by defective bolt face,
chamber or incorrect headspace. Headspace (see 3.3.3) shall be
checked using a contractor designed, Government approved
measuring device.
4.5.5 Functioning test. The rifle shall be tested by hand
functioning and function firing. Prior to firing, five dummy
cartridges shall be chambered, extracted and ejected by hand
operation of the bolt with pulling the trigger. Rifles shall
then be function fired by firing at least 10 rounds. cambering
of each of the 10 rounds shall be accomplished by thrusting the
bolt forward sharply with the safety off. Before each round is
fired, the safety device shall be checked (see 3.2.7) by
attempting to fire the rifle with the safety device set at the
safe position.
4.5.6 Targeting test. The rifle shall be fired with the
rear sight set at zero windage and elevation on the index plates
and aligned at the center of bull's-eye or circle using aperture
front sight insert. The targets shall be checked to determine
whether the targeting requirements have been met, nd the rear
sight shall be checked to determine whether additional index
plate adjustment is available (see 3.3.5.2).
4.5.7 Accuracy firing test. The rifles shall be shoulder
fired or fired using a forearm and elbow rest or a machine rest
simulating shoulder firing. Each rifle may have up to a 10-shot
warn-up, prior to test, for adjustment of test equipment and
rifle. One refiring of one individual target of 10 shots will be
permitted to eliminate nonrepresentative results due to ammuni-
tion "flyers". A flyer" is defined as a shot hole which is a
greater distance from the nearest shot hole than the extreme
spread of the other 9-shots of the 10-shot group. One refiring
of any target will be permitted to eliminate nonrepresentative
results induced by faulty test procedure or malfunctioning test
equipment.
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