What is the difference between TMJ and FMJ? - ProProfs Discuss
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What is the difference between TMJ and FMJ?

Asked by B. Wright, Last updated: Dec 18, 2019

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W. Wright

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W. Wright, Biology student, Biology student, Astoria

Answered Aug 22, 2019

TMJ stands for total metal jacket ammo, and FMJ stands for full metal jacket ammo. Neither of these two was made to expand on impact. However, their difference lies in their penetration and price range. Since TMJ is considered to be a plated bullet, it has been observed that its penetration into a hard target is not as effective as using an FMJ. Since the plating is more breakable on the FMJ, it will likely fragment more as compared with the full metal jacket. TMJ is more expensive th...Read More
 

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