FMJ vs. Hollow Point: Making the Right Choice for 5.56×45mm Rounds
Brasskisses 
“Ammo isn’t one-size-fits-all—it’s purpose-driven.” This is true when choosing between full metal jacket (FMJ) and hollow point rounds. Both are common, both are effective, but they serve different needs. For shooters using 5.56x45mm ammo, the choice often comes down to what matters most: practice, defense, or hunting.
If you’ve handled 5.56x45mm 55gr FMJ Ammo, you already know how reliable it is for training and range work. Hollow points, on the other hand, are built with expansion in mind. Let’s break down what sets these two bullet types apart and when each one makes sense.
What Makes FMJ Stand Out
FMJ rounds are built with a lead core encased in a harder metal jacket. This design keeps the bullet intact as it flies, reducing barrel fouling and improving feeding in semi-automatic rifles.
For range days or high-volume shooting, FMJ is the go-to option. It’s cost-effective, widely available, and consistent. The downside? It doesn’t expand much on impact, which means penetration can be deep but without as much energy transfer to the target.
That makes FMJ great for practice, but less ideal for situations where controlled stopping power is needed.
The Advantage of Hollow Points
Hollow points are designed with a small cavity in the tip. On impact, that cavity forces the bullet to expand outward. The result? More damage within the target and less risk of over-penetration.
This makes hollow points especially useful for self-defense and hunting. Expansion means energy is delivered quickly, which can stop a threat faster or bring down game more efficiently.
However, hollow points usually cost more than FMJ. They also may not feed as smoothly in every firearm, which is why testing them in your specific rifle is important.
Comparing Performance in 5.56×45mm
When it comes to 5.56x45mm 55gr FMJ Ammo, you’re looking at a round that excels in accuracy, speed, and affordability. It’s perfect for training, competitions, and stockpiling for range use.
Switch to hollow points, and you gain controlled expansion and stopping power. This makes them better suited for home defense or hunting medium-sized game.
In short, FMJ is the workhorse, while hollow points are the specialist. Both have value, but your choice should depend on your purpose.
Safety and Practical Considerations
A key factor to keep in mind is your environment. FMJ’s deep penetration could pose risks in urban or indoor settings where over-penetration is a concern. Hollow points, with their rapid energy transfer, may reduce that risk.
On the other hand, if you’re firing hundreds of rounds in training, the cost of hollow points adds up fast. That’s where FMJ shines by being economical and consistent.
Final Words
Choosing between FMJ and hollow point isn’t about which is “better.” It’s about which is right for your purpose. FMJ rounds give you affordable, reliable practice. Hollow points provide expansion and stopping power where it matters most.
Think of them as tools in the same toolbox. Each has a job, and the best shooters know when to use one over the other. For anyone working with 5.56x45mm ammo, understanding these differences helps you shoot smarter, safer, and with more confidence.
