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11B6R - Artillery/AA round question.

84Bravo1
Couple questions for you Sir.

I've got a few artillery and what appears to be AA rounds from my Dad's collection. I know about most of them.

I have two I have questions about. The first appears to be a High velocity 55mm (?) round. Markings on projectile "M55BG TP-T/BOF."

Second I only have two brass cases. (Both painted matte gold, prior to application of the markings.) Appears to be 40mm High velocity AA rounds. "McA-55, UE 17".

Any insight you could give me would be most appreciated.


Thanks

-Ken-
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Comments

11 comments

Date Votes
  • mrmike08075
    5" general purpose and a twin 40mm bofors...

    That would be guesstimate.

    Mike
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  • 84Bravo1
    5" General purpose in what type of gun/artillery piece? (5" would more of a Navy round, and quite large.) The projectile measures out to apprx 2 1/4" just now. I had heard it was a Sherman tank round?

    I figured the 40mm's would likely be Bofors, although I do not know how my Dad would have come in contact with them. (Army) I thought Bofors were Navy AA rounds.

    Thanks for the reply Mike. (Been thinking about you Brother.)
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  • mrmike08075
    We mounted a twin 40mm bofors on a turretless / open topped tracked vehicle / tank chasis and used it as a direct ground fire weapon in a tank / vehicle destroyer role (and maybe on a half track or greyhound platform)

    The 20mm twin or single orliken was deployed in a similar manner

    If the other is too small to be 5" GP naval gun (frigates and destroyers) than I shall reconsider the alternatives and try to come up with a better candidate

    Mike
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  • 11b6r
    The Sherman used a 75 mm round (3 inch) before they upgraded to 90.

    Good possibility that you MAY have a Training Practice (TP) round for the M18 57mm Recoiless Rifle. Ammo looked something like this: https://upload.wikimedia.org/wikipedia/commons/a/a2/57mm.png


    Intended mainly as an anti-armor weapon.


    The 40mm was used for a LONG time- mainly anti-aircraft, but the M42 "Duster" was a tracked vehicle that had 2 40s, and was REAL good for convoy escort in Nam.
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  • 84Bravo1
    Thanks for the reply 11b6r.

    I looked at the link. It is nothing like that. Looks like a huge .30-.06 round. Brass is tapered (necked down) to the 55-57mm projectile. Brass would be about 3" diameter at the neck, about 4-4 1/2 at the base. It's like a 105, but smaller.
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  • 35 Whelen
    Any of these? The shorter 40x311 looks like Bofors ammo, and I have no idea what the longer one next to it fits.

    Bofors%20family.jpg
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  • 35 Whelen
    Guess I should read the page that goes with the pictures sometimes. The 40mm's and 57's are Bofors.[:I]
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  • 84Bravo1
    quote:Originally posted by 35 Whelen
    Any of these? The shorter 40x311 looks like Bofors ammo, and I have no idea what the longer one next to it fits.

    Bofors%20family.jpg



    Yes the 40X311R looks a lot like my 40 mm cases. The one to the far right, 57X438R, look a looks a lot like my other projectile.
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  • p3skyking
    Gold means it's a drill round
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  • mrmike08075
    57mm sky sweeper mobile anti aircraft cannon???

    Mike
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  • 84Bravo1
    Thanks P3 and Mike. I'm at a loss as to what the larger round went to.

    I always figured the smaller 40mm's were Bofors rounds. Never heard matte gold were "dummy rounds. Primers are indented and cases still smell of gunpowder. (?)


    When cleaning out my Dad's large double garage after his passing, I came across several paper bags. Looked liked nothing special. First bag held two Arisaka bolts (Mum intact.) Second paper bag held the two 40mm cases. I did not throw anything away without looking closely at it first after that.
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