What is the Difference between FMJ and TMJ

Discussion in 'Ammunition & Reloading' started by CAMCHAMPION1988, Nov 3, 2011.

  1. CAMCHAMPION1988

    CAMCHAMPION1988 New Member

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    Is there really a difference?
     
  2. spittinfire

    spittinfire New Member Supporter

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    No, they are the same.
     

  3. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    FMJ has a copper or cupro-nickle jacket over a lead core. There is an unjacketed area at the base where the core was inserted into the jacket during forming.

    TMJ has no exposed lead. The jacket completely encloses the lead core. I believe the Speer TMJ is actually plated like the Gold Dot.
     
  4. JonM

    JonM Moderator

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    Total metal jacket is what tmj is. I prefer tmj to traditional jacketed rounds for range ammo. You dont get to breathe small ammounts of vaporized lead. There is also no lead to deal with during cleaning. Lead can leech into skin or contaminate work surfaces.

    Its generally cheaper and ive never seen a lick of difference shooting it out of my 45s