What is the Difference Between TMJ Ammo and FMJ Ammo?

The main difference between TMJ (Total Metal Jacket) and FMJ (Full Metal Jacket) ammo lies in the jacket application and the base of the bullet. Here are the key differences:

• Jacket Application: FMJ bullets have a jacket swaged onto the bullet, typically made of a copper alloy, while TMJ bullets have a thin layer of copper applied via electroplating.
• Base Exposure: FMJ bullets have an exposed lead base, as the jacket does not encapsulate the entire bullet. On the other hand, TMJ bullets have an enclosed base, meaning there is no exposed lead at the base of the projectile.
• Performance: Generally, TMJ ammo has similar performance to FMJ ammo, with some shooters reporting slightly improved accuracy. However, the accuracy difference between TMJ and FMJ projectiles is minimal.
• Lead Exposure: TMJ ammo is cleaner, meaning shooters are exposed to less lead, especially in indoor ranges. This can be beneficial for competitive shooters or those who frequently use indoor ranges.

In summary, while both TMJ and FMJ ammo have similar performance, TMJ ammo offers reduced lead exposure and a cleaner shooting experience, especially for those who shoot frequently or in indoor ranges. However, the accuracy difference between the two is minimal.

Comparative Table: TMJ Ammo vs FMJ Ammo

TMJ (Total Metal Jacket) and FMJ (Full Metal Jacket) ammo are both types of ammunition used for target practice and plinking. They have some differences in their design and usage, which are summarized in the table below:

In summary, TMJ ammo is designed to reduce lead exposure and provide a more uniform surface for propellant gases, making it ideal for indoor ranges and high-volume shooters. On the other hand, FMJ ammo is more widely available and generally less expensive, making it suitable for a variety of shooting applications.