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MIL-C-70690 (AR)
b. Manufacturing process. All parts and assemblies shall
be manufactured by a process approved by the contracting officer,
and no deviation from that process shall be made without prior
approval of the contracting officer (see 6.7).
3.1.1 Cartridge.  The fuzeless cartridge shall comply with
all requirements specified on Drawing 12597642, all associated
drawings, and with all requirements specified in applicable
specifications.
3.2 Projectile extraction.  The tensile force necessary to
extract the projectile from the sample cartridge case shall be as
specified by Drawing 12597642 (see 4.4.1).
3.3 Projectile torque.  The sample projectile shall withstand
a minimum of 30 in-lbs torque without rotational movement (see
--
4.4.3).
3.4 Velocity.  The average muzzle velocity of the sample
cartridges, conditioned shall be 1100 20 meters per second
(mps).  The sample standard deviation shall not exceed 5 mps (see
4.4.4).
3.5 Pressure.  The average peak chamber pressure of the
sample cartridges, conditioned at 21 3C, shall not exceed
402 megapascals (MPa). The average peak chamber pressure of the
cartridges, when functioning at any individual temperature from
-46C to 62C, plus five standard deviations of peak chamber
pressure, shall not exceed 496 MPa and no individual sample
cartridge shall exceed 496 MPa. Pressure shall be measured with a
piezoelectric type pressure transducer (see 4.4.4).
3.6 Dispersion.  The standard deviation of impacts in both
the horizontal and vertical directions of the sample fuzed
projectiles shall not exceed 0.50 milliradians when the cartridges
are conditioned at 21 3C (see 4.4.5).  For this test, the
test barrel will be fitted and fired with a muzzle brake.
3.7 Action time.  The action time of the sample cartridges
shall not exceed 6.0 ms at any cartridge temperature from -46C
to 62C (see 4.4.6).
.
3.8 Projectile trace.  The sample projectile shall exhibit a
visible trace when viewed against a dark background, for a minimum
of 3.5 seconds from the gun muzzle flash at any cartridge
temperature form -46C to 62C (see4.4.7).
See 4.4.8.
3.9 Projectile function.
3.9.1 Projectile impact function. The sample fuzed
projectiles shall function upon impact or up to one meter behind a
target of 0.063 inch nominal thickness aluminum plate 2024-T3 at
0 obliquity, at a distance of 200 5 meters from the weapon at
any temperature from -46C to 62C.
3

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