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Old March 3, 2007, 05:09 PM   #1
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How are brass cartridges manufactured?

Can anyone shed light on this? How is molten brass formed into sheets and then formed into boxer-primed style brass cartridges?

Pics from raw material to final product would be a huge plus.
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Old March 3, 2007, 05:58 PM   #2
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I think brass as we loaders know it isn't poured into a mould, it's drawn from solid metal..........Creeker
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Old March 3, 2007, 06:03 PM   #3
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Brass isn't made from sheets. It's made from a "button" think hockey puck but smaller and made of brass. this is placed on a die. then under a lot of pressure the rod presse the brass down into the die. For most cartridges this process is done three times. you now have a crude cartridge the bass has not been formed or the flash hole punched. it goes into another press and the base is formed another process puts on the head stamp. if it's a bottle neck case it goes through a series of dies to form the neck. forming the neck is like a regular reloading die. The machine is much bigger and works faster. Oh the primer pocket is formed at the same time as the base. the last proces is punch the flash hole. then the case is trimmed. except for a series of inspection stations to verify the case your done. These machines are big and noisy sounds like a high speed stamping mill.
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Old March 3, 2007, 11:23 PM   #4
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"Brass isn't made from sheets."

Actually, the 'coins' used to draw are puncked friom sheets of brass.
They are then run through a series of drawing punckes that gradually form a straight walled case of the desired dimensions.
One of the last steps is to neck down bottlenecked cases.
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Old March 4, 2007, 12:42 PM   #5
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brass cart

actually molten brass is made into pigs like we do bullets then rolled in to sheets then punched into disks after that it is( as mentioned in another post)ran thru dies to cup it then others to make the final form.from time to time gun books show the procces.
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Old March 4, 2007, 09:11 PM   #6
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Midway has a video from GunTech TV showing Winchester ammo being made.

Near the bottom of the page called "Field Trip: Winchester Ammunition"
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