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Thread: .303 interesting headstamp

  1. 02-06-2021, 05:39 PM #1
    atr
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    .303 interesting headstamp

    Attachment 277065

    from a box of old .303 British ammunition made by Winchester
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  2. 02-06-2021, 06:35 PM #2
    cwtebay
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    Definitely interesting, I have a "grail" 2 piece of Winchester with an 1895 call out on the box. I wasn't aware there would be a headstamp that late. Thank you for sharing!

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  3. 02-06-2021, 07:26 PM #3
    relics6165
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    It's been awhile, but I believe this headstamp was for a Winchester contract WW2 loading for the Brits. I believe they were dated from 1941 to 1943, and labeled Not For Bren Gun because of the different burning characteristics of USA used nitrocellulose vs. British used cordite.
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  4. 02-06-2021, 07:32 PM #4
    MOC031
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    Quote Originally Posted by atr View Post
    Attachment 277065

    from a box of old .303 British ammunition made by Winchester
    Staked primer pocket suggests military ammo versus civilian

    Winchester Repeating Arms Co., New Haven, Conn., USA. Known to have made nitro-cellulose loaded .303 cartridges for 1914 - 1917 military contracts as... B, and Mk 7. During WW2... B, Mk 7Z (Contract Pattern),Scott multiball (duplex) and 180 gr jacketed soft point sporting Ammunition.

    https://sites.google.com/site/britmi.../united-states

    https://classicglasspars.com/303/303.htm

    http://dave-cushman.net/shot/303headstamps.html
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  5. 02-06-2021, 07:52 PM #5
    atr
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    yes it was military...FMJ
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  6. 02-11-2021, 09:58 PM #6
    richbug
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    Quote Originally Posted by relics6165 View Post
    It's been awhile, but I believe this headstamp was for a Winchester contract WW2 loading for the Brits. I believe they were dated from 1941 to 1943, and labeled Not For Bren Gun because of the different burning characteristics of USA used nitrocellulose vs. British used cordite.

    There were 2 different labels. The Black ink labels were printed "Not for synchronized guns"

    The Red label stuff was labeled for aircraft use(synchronized guns).

    Both were loaded with ball powder. Both worked fine in a Bren gun.
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  7. 02-12-2021, 08:33 PM #7
    Outpost75
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    Good ammo. I have a substantial quantity of it. Mine is loaded with Ball powder. NOT Cordite or extruded nitrocellulose. Is boxer primed, but corrosive. Brass is good. Accuracy is very MUCH better than average WW2 Brit stuff. Bullet diameter is .3125-.313"

    Attachment 277484Attachment 277485Attachment 277486Attachment 277487Attachment 277488
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  8. 02-12-2021, 09:11 PM #8
    nicholst55
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    I have encountered some wartime British ammo loaded with undersized bullets. I can vouch that the accuracy that it provides is pretty dismal! IIRC, the bullets miked around .306".
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  9. 02-13-2021, 09:53 AM #9
    yovinny
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    The Brit Mk7 fmj has an concave exposed lead flat base,, so to bump up and help seal those generous bore and grove diameters... and a light weight tip filler,, so to upset and tumble apon soft tissue contact.
    You cant buy a comparable fmj bullet for any price from any manufacturer today....
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check