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The 37MM m4 rounds blew up after 3 seconds like they should.
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High-explosive shell, 37 mm, M54 standard
This shell uses the point detonating fuse, M56. The complete round weighs 1.99 pounds (900 g); as fired, the projectile weighs 1.34 pounds (1,050 g). The 0.16-pound (70 g) charge of M2 powder is a Hercules NG formula of single perforated grains with 0.030 inch (0.76 mm) web and gives the projectile the prescribed muzzle velocity of 2,000 feet per second (600 m/s).
The M54 features the shell-destroying tracer in addition to the point-detonating fuze. The tracer, which has a burning time of three seconds, sets off an igniting relay charge of 1.68 grains (0.109 g) of Grade A-5 Army Black Powder which ignites a relay pellet to detonate the charge and destroy the shell before ground impact.
The bursting charge of tetryl weighs 0.10 pound (45 g), and the alternate Composition “A” charge weighs 0.105 pound (48 g). The tetryl loading consists of a 200 grain (13 g) tetryl pellet pressed into the shell cavity under 9,000 to 10,000 psi (60 to 70 MPa) pressure and the remainder of the charge of two equal increments pressed under approximately 9,000 psi (60 MPa) pressure. The Composition “A” bursting charge is loaded in the same manner as the tetryl charge, except that the relay pellet with the Composition “A” weighs 36 grains (2.3 g) as against 23 grains (1.5 g) for the pellet used with the tetryl load.
http://en.wikipedia.org/wiki/M4_cannon pray
Question Also : Do our m4 cannons (p39's & Pt boat) use the M80 or M54 rounds?
Thank you.
