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SMG ammo description

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Stalins Organ:
sometimes I can be Mr Picky.... 8)


--- Quote --- It fires an upgraded version of the Belgian 5.7mm armour-piercing round, a steel penetrator with aluminium core....
--- End quote ---


Um.....it's got to be some really amazing technology to have an aluminium core for AP ammo - one would normally expect AP ammo to have a hard core such as steel, tungsten or DU, and the aluminium to be the outer material to reduce weight thus increasing velocity and AP performance.

Winter:

--- Quote from: "Stalins Organ" ---sometimes I can be Mr Picky.... 8)


--- Quote --- It fires an upgraded version of the Belgian 5.7mm armour-piercing round, a steel penetrator with aluminium core....
--- End quote ---


Um.....it's got to be some really amazing technology to have an aluminium core for AP ammo - one would normally expect AP ammo to have a hard core such as steel, tungsten or DU, and the aluminium to be the outer material to reduce weight thus increasing velocity and AP performance.
--- End quote ---


It's based off of the current-day 5.7x28mm cartridge, which is a steel penetrator with an aluminium core.

Quoting from Wikipedia:
"The SS190 AP ball FMJ is designated as Armor Piercing (AP) ammunition, designed to penetrate body armor. Its sale to civilians is restricted. The SS190 bullet has a steel penetrator and an aluminum core."

We do our research before we write things down. :P

Regards,
Winter

Alex:
I bet the steel adds weight to the projectile to give it enough momentum to pierce the armour, while having a softer core allows it to deform as it penetrates the armour, so when it reaches the flesh it breaks apart and makes a mess of a persons insides.

breversa:
Deformation usually goes against penetration, so I'm also puzzled as to why an aluminum core instead of a steel one. Is there any metal specialist here who could tell us the compared caracteristics of steel and aluminum (hardness, density, etc) ?

Alex:
Yeh, where's a metalurgist when we need one?

From WikiPedia:http://en.wikipedia.org/wiki/Armor-piercing_bomb
--- Quote ---The entire projectile is not normally made of the same material as the penetrator because the physical characteristics that make a good penetrator (tough, hard metal) make the material equally harmful to the barrel of the gun firing the round.
--- End quote ---

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