Difference Between FMJ ammo and TMJ Ammo

Rifles and weapons may be used for a variety of purposes, whether you are a policeman, a sniper, or a hunter. What type of ammunition you need will be context-specific and application of your handgun or rifle, and the distinctions between TMJ and FMJ become questions that must be answered before you go out and buy your ammo.

FMJ Ammo vs TMJ Ammo

The main difference between FMJ ammo and TMJ ammo is that FMJ, or Full Metal Jacket, refers to a bullet that is enclosed in a solid metal casing. Usually, these rounds are solid at the back, exposing a little portion of the core. TMJ is for Total Metal Jacket, and it is round as well; nevertheless, the difference is that it is completely encased in metal and therefore does not expose the leads in any manner.

FMJ ammo and TMJ Ammo

The phrase “full metal jacket” or FMJ refers to the lead projectile being enclosed in a different tougher metal – commonly copper, but some other elements and even nanocomposite are occasionally used. And using their own production processes, FMJ manufacturers can have a vast range of ammunition lines, so you can generally pick and choose from various materials, styles, and purposes.

Total metal jacket (TMJ) cartridges are manufactured by soldering a thin jacket of ductile materials (typically copper) over a base of a variety of metal that requires abrasion or cathodic protection. Comparable complete metal jacket bullets swage a narrow layer of metal over the center manually.

Comparison Table Between FMJ Ammo and TMJ Ammo

Parameters of ComparisonFMJ AmmoTMJ Ammo
Full FormFMJ is the acronym for Full Metal Jacket Bullets.TMJ is the acronym for Total Metal Jacket bullets.
MeaningThe phrase “full metal jacket” or FMJ refers to the lead projectile being enclosed in a different tougher metal – commonly copper, but some other elements and even nanocomposite are occasionally used.Total metal jacket bullets, abbreviated “TMJ,” are a popular projectile type at indoor facilities as well as among professional shooters. 
EnvironmentFMJ ammunition are not environmentally friendly as they leak lead.TMJ ammunition is environmentally friendly.
Health ConsequencesFMJ are not preferred for self defense or indoor usage as they are very harmful for health.TMJ are totally safe for self defense usage as these are not toxic for health if fired even from close range.
CostThese are cheaper than TMJ ammo.These are costlier than FMJ ammo.

What is FMJ Ammo?

Full metal jacket ammunition may alternatively be referred to as full metal case ammunition or may have extra suffixes such as “boat tail” to indicate the planned usage of the projectile or how it will function. Full metal jacket boat tail, full metal jacket flat nose, as well as full metal jacket tapered cones are some examples. Each of these encased bullets is designed for specialized use, although they all have the same fundamental lead characteristics as FMJ bullets.

The primary advantage of utilizing an FMJ bullet would be that the lead bullet is primarily (if not entirely) wrapped by tin, copper, or other metal jackets. This serves to maintain the lead from accumulating in the barrel when it shoots.

When a lead projectile engages the groove of the barrel, a little quantity of lead is left inside, which accumulates after multiple rounds and makes the shots less precise. Metal deposition is considerably minimized when a jacket is placed over the core.

This enables a greater number of bullets to be fired before accuracy deteriorates. Although this isn’t a big deal for the casual gunner or hunter who could fire 100 rounds before maintenance, it’s a great benefit for the high-volume shooter.

What is TMJ Ammo?

Total metal jacket bullets abbreviated “TMJ,” are a popular projectile type at indoor facilities as well as among professional shooters. The explanation for this is straightforward but crucial: The standard full metal jacket (FMJ) cartridge contains a minuscule bit of visible lead at the bottom, whereas the TMJ covers the exposed lead region with metal. Utilizing TMJ bullets, combined with other measures to reduce lead exposure, can help you become a healthy shooter.

Theoretically, a total metal jacket is a complete metal jacket, therefore those who are inexperienced in shooting or hunting are sometimes perplexed. In many cases, these phrases are identical, and a cursory inspection at a magazine will reveal whether or not lead is present.

The major purpose of using a TMJ bullet is to reduce lead exposure. The elevated blood lead concentrations are not amusing and can lead to a variety of significant health problems.

This is capable of causing joint discomfort, weariness, memory loss, and a long list of other negative consequences. Managing blood lead levels is so crucial that some interior ranges prohibit the use of any lead-exposed ammunition, even standard FMJ.

Main Differences Between FMJ Ammo and TMJ Ammo

  1. FMJ Ammo stands for Full Metal Jacket Ammunition whereas TMJ stands for Total Metal Jacket.
  2. FMJ is a projectile that has a metal surface but is not completely coated whereas TMJ is a bullet with a completely coated surface of the metal.
  3. FMJ ammo is harmful to the environment whereas TMJ ammo is environmentally friendly.
  4. FMJ ammo is cheaper than TMJ ammo.
  5. FMJ causes lead leakage and hence the gun needs to be cleaned frequently whereas TMJ ammo bullets do not leak and therefore keep the nozzle of the gun cleaner.

Conclusion

Because they are less costly, full metal jacket (FMJ) bullets are ideal for range shooting. Since you can buy more of these, you can operate with this more frequently, which is vital. TMJ rounds are also more expensive and should be reserved for self-defense circumstances and put in your Everyday Carry (EDC) defense firearm. These are also excellent as home defense weapons.

References

  1. https://ammo.com/bullet-type/total-metal-jacket-tmj
  2. https://www.hornady.com/bullets/fmj
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