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<p>[QUOTE=&quot;springfld.arsenal, post: 21479, member: 54&quot;]If 7mm diameter. that&#039;s been a popular military caliber for rifles and machine guns in 20th C in places like South America.&nbsp; I haven&#039;t seen a bullet constructed like that but there are so many 100&#039;s of thousands of bullet designs it could be an armor-piercing rifle/machinegun bullet.&nbsp; The copper-looking bulge would be the rotating band, needed to cause the bullet to spin-up going down the rifled bore, and the brass or copper nose could be an aid to penetration in reducing ricochets and shattered bullet cores.&nbsp; May be tungsten-carbide steel-check by trying to scratch it with screwdriver or knife blade (on shiny part) and if very hard to scratch, may be very hard armor-piercing steel such as tungsten-carbide.&nbsp; Or, post on BOCN (British Ordnance Collector&#039;s Network) as they will probably recognize it if it is a real ordnance item.&nbsp; Magnetism means it went thru a junkyard and a magnet picked up clumps of these to move them around. The corrosion pattern looks just like what I&#039;ve seen on tungsten-carbide bullet cores that have been exposed to moisture.[/QUOTE]</p><p><br /></p>

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