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Thread: US 37mm AA gun

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    US 37mm AA gun

    another handbook, this time American and very similar to a 40mm Bofors. Sadly, no colour plates so I have included a few shells for good measure. Strangely, the handbook shows the use of both rimmed and rebated cases. Perhaps one of our colonial friends can explain. Following experience in the field, the US changed its colour for HE from yellow to green. Dave
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    AA munitions, some pages I have

    I think the M63 types and long AP would be for the A.T. gun, too long for the AA feed ? I an surprized the rimmed M16 case is listed for the AA gun.
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    Last edited by Gspragge; 23rd October 2008 at 10:05 PM.

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    37mm A.T. Gun loadings

    and Tank guns etc.
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    M54 projectile, M56 fuse, M17 case

    This post should perhaps be in Projectiles, but to keep the thing going here it is.
    This is a Drab M54 projectile with a Blue painted M56 fuse,
    Projectile is marked faintly in yellow ;
    AMM LOT , LOP, 16-1 / 37G, INERT, M-54
    rotating band; O.W.S. - 1 - 40 1943 - 37MM M54
    Fuse is marked;
    Fuse PD M56, 7-43 LOT LOP 145, ink marks (unclear) ???? M56 LOT LOP 3-16
    Case; Sand filled for weight-
    Ink stamped INERT on the side
    Headstamp;
    37MM M17
    B (in diamond) B B - 1 - 51 - 1943 Ord. Corps stamp.
    Primer;
    M38 B2, LOP - 2 - 17 - 44
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    The rimmed 37mm rounds were used in the anti-tank gun and also in the M3-M5 Stuart light tank guns. It was also used in the top turret of the M3 Grant/Lee medium tanks. They were single loaded, not automatic.
    The rimless rounds were for the AA guns and were also used in the U.S. Bell P-39 Aircobra and Bell P-63 fighters.
    On another site it was mentioned that research had shown that almost all the 37mm rimless requested and received by the Soviets for use with their lend-lease P-39s and P-63s were the high explosive rounds not the A.P. rounds as expected for tank busting.

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    Nice Pics you have there
    All Items of Live Ordnance posted by me have been disposed of professionally by EOD. Unless they are Archive Pictures from another Webpage

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    Hi Rickoshea,
    Thanks for posting the pics and for the info on the US changing the colour of its HE projectiles from yellow to green. I have often wondered if one of mine had been repainted the wrong colour as it was green but there is my answer. Thanks again,
    Best Weasel.

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    hi Weasel, i believe I'm right in saying that it was the US habit of hanging grenades from there breast pockets that instigated the change as the japanese used the yellow target near the heart as an aiming point! So I guess that yellow would be right for dates up to late 42 then green. Dave

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    many thanks for that Max, I'll have to read the manual end to end to see if hidden away in the narrative is an explanation. Dave

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    Quote Originally Posted by Maxrobot View Post
    The rimmed 37mm rounds were used in the anti-tank gun and also in the M3-M5 Stuart light tank guns. It was also used in the top turret of the M3 Grant/Lee medium tanks. They were single loaded, not automatic.
    The rimless rounds were for the AA guns and were also used in the U.S. Bell P-39 Aircobra and Bell P-63 fighters.
    On another site it was mentioned that research had shown that almost all the 37mm rimless requested and received by the Soviets for use with their lend-lease P-39s and P-63s were the high explosive rounds not the A.P. rounds as expected for tank busting.
    The 37mm rounds that were used in the P-39 and P-63 were the 37mm M4 which had a shorter less bottle necked case see the 37mm 145r.

    http://www.quarry.nildram.co.uk/WW2aircart2.jpg

 

 
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