HOWTO make headphones out of old bullets

http://i.imgur.com/p4PCEA4.gifv

Got some extra .40 cal casings kicking around and want to cosplay the scene in the Dark Tower books where the gunslingers stick bullets in their ears to block out the siren call of the "thinny?"

This awkwardly presented GIF HOWTO's got you covered. What's that? I can't hear you, I've got bullets in my ears!

Creating headphones from bullets [Gallowboob/Reddit]

Notable Replies

  1. Yet another way to stand in line at the TSA when they detect gunpowder residue.

  2. The more expensive defense ammo is usually nickle plated. Shiny silver.

  3. Nickel is allergenic. The skin may not react well to prolonged contact.

    However, there's some noise out there about stainless steel casings. Not sure about what grade it is (304? 316?), so it still may corrode if exposed to chlorides-containing sweat (human sweat is worse than seawater, pretty unpleasant environment for metals).

    Most likely yes. Their load of primary explosive is spent, all that remains is a metal cup with a little residue.

    Sometimes the purpose of having ammo is to have it many years later in case it really becomes necessary. Long-term storage capability, which includes all sorts of worries about material compatibility and corrosion characteristics, then gains quite some importance.

    (And then there are the reloading issues and salvage of spent casings.)

    Besides, this topic is about reuse of spent cartridges for jewellery/accessory purposes, which is a completely different can of worms, even if the underlying corrosion and metallurgy issues are the same.

    Wash it clean with acid. Don't use nitric, it will eat through the metal fast. Be careful with temperature and concentration as even hydrochloric can eat through brass fast. Maybe phosphoric would be the best?

    And/or line it with epoxy or another barrier layer. Which will also solve the corrosion issues.

  4. 316L doesn't generally corrode under normal piercing conditions. It's pretty much the go-to for body jewelry.

  5. Not that I am aware of. It would be expensive and what I understand it is hard to work with.

    There are plastic cased rounds though... That would be pretty hypoallergenic.

    Generally speaking, the rifles barrel/breech is what contains all the pressure of the round going off. The case material isn't that relevant. Brass is preferred due to strength, low corrosion, re-usability, and its softer than steel so it won't erode the parts it slides against.

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