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  1. #1
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    Default 37mm M63-HE, M51-APC-T and M2 Canister shells for M3 Gun (USA-WW2)

    Cutaway models of three shells for the American WW2 37x 223R M3 anti-tank gun.

    20.000 M3 guns were built between 1939 and 1943, however on the western front is was considered to be too light to fight the German tanks. In the far east however it was adequate throughout the war as Japanese tanks were without exception lightly armored. It was used in many tanks, armored vehicles and self propelled anti tank guns. For instance: M5A1 Stuart tank, M8 Greyhound armored vehicle, the staghound armored car, Locust tank, Grant tank.

    -The 37mm M51 APC-T shot consists of a solid -nose hardened- steel shot with a piercing cap and a ballistic cap on top of the nose. The piercing cap is made of mild steel and divides the force of the impact over the entire nose of the projectile, preventing it from shattering upon impact. The aluminum windshield improves the ballistic performance. In the bottom of the shell a hole is drilled into which the tracer composition is pressed.
    The color of the projectile is black. Vo is 884 Mtrs/sec (2900 ft/sec).
    The shell will penetrate 53mm (2,1”) plate of steel at 457 mtrs (500 yards) and 46mm (1,8”) at 914 mtrs (1000 yards) at a 30 degree angle.

    -The 37mm M63 HE shell exists of a mild steel body, threaded in the bottom to receive the Base fuze M58. Around the firing pin an interrupted ring is placed in a groove, fixating the setback sleeve in the forward position. The firing pin cannot move forward and reach the firing cap. Upon firing, the sleeve is forced backward by the setback force, the interrupted ring is bent open slightly and falls into the lower groove. The firing pin can now reach the firing cap if it moves forward, kept in backward position only by a weak spring. On impact the firing pin is launched forward into the detonator by inertia. The shell is filled with 39 grams TNT. Color of the projectile is yellow.
    Vo. is 782 mtr/sec

    -The 37mm canister shot M2. It acts as a large shotgun and is very effective against groups of attacking infantry.
    The projectile is build-up of sheet metal and houses 122 steel ball with a 10,5 mm diameter, cast in resign. The length of the projectile body is 160mm long.
    Weight of the round is 1,58kg, the projectile weighs 0,88kg.
    Vo: appr. 755 mtrs/sec.

    Regards, DJH
    Last edited by PzGr40; 05.05.2019 at 13:53. Reason: improving text and photo's

  2. #2
    AZ16 is offline Erfahrener Benutzer User
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    Default

    Thanks for sharing.

  3. #3
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    Default

    You're welcome.
    Regards, DJH
    You wanna make a piece of ammo look interesting? .......cut it!

    Looking for / Suche noch:
    -8,8cm Pzgr.40.

  4. #4
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    I improved and replaced the Original posting with an improved text and better cutaway models (90 degrees cut instead of 180 degrees)

    Regards, DJH
    Last edited by PzGr40; 15.04.2019 at 17:11.
    You wanna make a piece of ammo look interesting? .......cut it!

    Looking for / Suche noch:
    -8,8cm Pzgr.40.

  5. #5
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    Well done DJ!
    Ich suche Wissen!

    SCIENTIA POTENTIA EST!

    Wer nichts weiß muss alles glauben!

    Und wer toleriert uns?

    Studiert den Hooton-Plan, den Kaufman-Plan und den Morgenthau-Plan!

    Ich bin verantwortlich für das was ich sage, nicht dafür was jemand anders versteht!

    https://blog.naanoo.com/musik/deutsc...xt-strophe-1-3
    https://www.youtube.com/watch?v=1UkmhtoXCPA
    https://www.youtube.com/watch?v=_aw9aRyjLcI

  6. #6
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    Added to the collection;
    A squeeze bore or Jancek (Little John) cartridge for the 37 mm M3 gun. The M3 gun was adjusted so a T1 conical barrel piece could be screwed to the end of the barrel. (see pict.-06).
    As one can imagine it was not a very popular adjustment as one had to screw this piece on the barrel during battle, allowing for armour piercing shells of this type to be fired only. Accidently firing a normal shell in the heat of battle would result in the barrel be blown to pieces. It was however possible to fire the squeeze bore projectile without the T1 adapter, however this had a negative influence on the penetration value of the projectile at longer distances.
    One will understand that APDS -that was invented halfway the second world war- was much more popular as it did not require field adjustments to the barrel during the battle, did not cause excessive barrel wear due to high pressures, and had better results over longer distances.
    The Projectile consists of a steel body with a tungsten penetrator. The outer sleeve is pushed inward thereby moving it down, filling the gap. The conical flange at the base is also bend inward, leaving a smooth body ø30mm shell after the projectile has left the T1 conical barrel piece.

    Regards, DJH
    Last edited by PzGr40; 05.05.2019 at 13:59.
    You wanna make a piece of ammo look interesting? .......cut it!

    Looking for / Suche noch:
    -8,8cm Pzgr.40.

  7. #7
    Join Date
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    DJ, great cutaway! Just that your projectile is missing the lower skirt. Means the case crimp was not as on your sectioned sample but had a cylindrical case neck.
    Here a diagram of the 40mm to illustrate what I mean:
    Attached Images Attached Images
    Ich suche Wissen!

    SCIENTIA POTENTIA EST!

    Wer nichts weiß muss alles glauben!

    Und wer toleriert uns?

    Studiert den Hooton-Plan, den Kaufman-Plan und den Morgenthau-Plan!

    Ich bin verantwortlich für das was ich sage, nicht dafür was jemand anders versteht!

    https://blog.naanoo.com/musik/deutsc...xt-strophe-1-3
    https://www.youtube.com/watch?v=1UkmhtoXCPA
    https://www.youtube.com/watch?v=_aw9aRyjLcI

  8. #8
    Join Date
    08.05.2003
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    4,670

    Default

    Found this drawing, maybe it is of help.
    Attached Images Attached Images
    Ich suche Wissen!

    SCIENTIA POTENTIA EST!

    Wer nichts weiß muss alles glauben!

    Und wer toleriert uns?

    Studiert den Hooton-Plan, den Kaufman-Plan und den Morgenthau-Plan!

    Ich bin verantwortlich für das was ich sage, nicht dafür was jemand anders versteht!

    https://blog.naanoo.com/musik/deutsc...xt-strophe-1-3
    https://www.youtube.com/watch?v=1UkmhtoXCPA
    https://www.youtube.com/watch?v=_aw9aRyjLcI

  9. #9
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    I have changed the pictures of the Shells for the following reason:
    At the BOCN forum I was informed by "M8 owner" - a collector of this specific type of shell- that the powder I placed in the shellcases was not of the right size and shape.
    I got my info from an old TM, and by now I started to realize that the powder drawn in there was the stylized depiction of powder in a shellcase.
    Therefore I have descided to replace the powder in the shellcases with -fake- powder that looks more like the real thing in shape and size.
    Sorry for the inconvenience.

    Regards, DJH
    Last edited by PzGr40; 05.05.2019 at 15:59.
    You wanna make a piece of ammo look interesting? .......cut it!

    Looking for / Suche noch:
    -8,8cm Pzgr.40.

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