MIL-PRF-48656B(AR)
3.2 Operating requirements.
3.2.1 Primed case sensitivity. The energy imparted by a steel ball weighing 1.94 ± 0.02 ounces
falling 12 inches onto a simulated firing pin shall cause initiation of the primer. The energy imparted by a
steel ball weighing 1.94 ± 0.02 ounces falling 2 inches onto a simulated firing pin (the simulated firing
pin shall have a nominal weight of 70 grains and a spherical end radius of 0.0500 ± 0.0025 inches) shall
not cause initiation of the primer.
3.2.2 Velocity. At a point 3.0 ± 0.5 feet from the muzzle of a 30.0 ± 0.1 inch test barrel, the
mean velocity and the standard deviation from the mean velocity shall be as shown in Table I.
TABLE I. Bullet velocity requirements
TYPE
NOMENCLATURE
VEL
SD
VEL
SD
VEL
SD
(FPS)
(FPS)
(FPS)
(FPS)
(FPS)
(FPS)
AMBIENT
HOT
COLD
1,325 ± 50
I
No. 00 Buckshot
25
1415 MAX
25
1415 MAX
30
1198 MIN
1198 MIN
1,145 ± 90
II
No. 9 Shot
25
-
-
-
-
1,145 ± 90
II
No. 7 ½ Shot
25
-
-
-
-
3.2.3 Chamber pressure. The maximum average chamber pressure shall not exceed 12,500 LUP
(lead units of pressure) or 13,000 PSI (pounds per square inch). The maximum individual pressure shall
not exceed 14,500 LUP or 15,000 PSI. The cartridges shall be tested at ambient, hot and cold
temperatures.
3.2.4 Function and casualty. The cartridge shall function without casualty in both manual and
semiautomatic shotguns.
3.2.5 Pattern. The pattern shall be as follows for the appropriate shot:
No. 00 Buckshot The average percentage of pellets inside or touching a 30 inch circle at a range
of 40 yards shall be no less than 65 percent when fired through a test barrel 29.0 ± 2.5 inches long with a
full choke.
Number 9 Shot The average percentage of pellets inside or touching a 30 inch circle at a range
of 25 yards shall be no less than 50 percent when fired through a test barrel 26.0 ± 0.5 inches long with a
skeet choke.
Number 7 ½ Shot The average percentage of pellets inside or touching a 30 inch circle at a
range of 40 yards shall be no less than 70 percent when fired through a test barrel 28.0 ± 2.5 inches long
with a full choke.
3.2.6 Shot Type. The cartridges shall have the following shot:
No. 00 Buckshot The cartridge shall contain 9 pellets of lead-free commercial shot size No. 00
Buck in accordance with SAAMI Technical Committee Manual Vol. IV Shotshell for No. 00 Buckshot
rounds.
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