| Type | Ball, Jetalized |
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| Projectile | FMJ, GMCS, black, 1 knurled crimping cannelure |
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| Case | brass, segmented taper crimp |
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| Primer | percussion, rounded, brass, ring crimp |
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| Headstamp | SL 43 |
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| Notes | In 1943 Western Cartridge Company experimented with several protective finishes on steel-jacketed M2 projectiles, which were loaded by St. Louis Ordnance Plant. This is the Jetalized version (verified by comparison to other known specimens). Other versions include Bonderized and Luberized, which have differing shades of grey/black. |
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