What Round Does the FN FAL Shoot?

Table of Contents

1. Introduction
2. The 7.62x51mm NATO: A Standardized Powerhouse
3. The History of the .280 British and the NATO Mandate
4. 7.62 NATO vs. .308 Winchester: Know the Difference
5. Ballistic Performance: What the Round Delivers
6. Tuning the FAL: The Adjustable Gas System
7. Magazines and Feed Reliability
8. Modern Loads and the FAL
9. Performance Under Pressure: Why the Round Still Matters
10. Building Your Loadout
11. Conclusion
12. FAQ

Introduction

In the history of small arms, few rifles carry the weight and authority of the "Right Arm of the Free World." During the height of the Cold War, while the East relied on the AK-47, the West turned to the FN FAL. For an operator transitioning from wood-stocked bolt-action rifles to the era of modern combat, the FAL represented a massive leap in capability. At Crate Club, we respect gear with a proven track record, and the FAL is the definition of battle-tested hardware.

If you are looking for the short answer, the FN FAL is chambered for the 7.62x51mm NATO round. However, the story of how it ended up with that cartridge—and how that choice defines the rifle's performance—is essential for any serious tactician or student of firearms history. This article covers the primary chambering of the FAL, the nuances between military and commercial ammunition, and why this specific pairing remains a powerhouse in the tactical world today.

Quick Answer: The FN FAL primarily shoots the 7.62x51mm NATO cartridge. While it can often chamber and fire the commercial .308 Winchester round, there are specific headspace and pressure differences that operators should understand before switching between the two.

Readers building a broader preparedness setup can choose a Crate Club tier to add field-tested equipment alongside their existing rifle platform.

The 7.62x51mm NATO: A Standardized Powerhouse

The 7.62x51mm NATO (North Atlantic Treaty Organization) is a rimless, bottlenecked rifle cartridge. It was developed in the 1950s as a standard for all NATO member nations. The goal was to provide a round that offered the power of the older .30-06 Springfield used in the M1 Garand but in a shorter, more efficient case that allowed for better cycling in semi-automatic and select-fire rifles.

The FAL was designed to capitalize on this round. As a "Battle Rifle"—a term used to describe a military service rifle that fires a full-powered cartridge and feeds from a detachable magazine—the FAL provides significantly more range and terminal energy than the "Assault Rifles" (like the M4 or AK-47) that came later.

For more context on how the platform fits into the broader category, read this guide to what defines a tactical rifle.

When you get behind an FAL, you aren't just shooting a rifle; you are managing a platform designed to deliver heavy-caliber fire out to 600 yards and beyond. The 7.62 NATO round typically utilizes a 147-grain or 150-grain projectile, moving at roughly 2,800 feet per second. This provides the penetration and "barrier-blind" performance that lighter rounds like the 5.56x45mm simply cannot match.

The History of the .280 British and the NATO Mandate

The FN FAL did not start its life as a 7.62mm rifle. When Fabrique Nationale (FN) began development in the late 1940s, they were actually focused on a much more modern concept: the intermediate cartridge. The original prototypes were chambered in the .280 British (7x43mm).

The .280 British was a visionary round. It offered excellent ballistics, manageable recoil, and was significantly lighter than the full-power rounds of the day. Had the FAL stayed in .280 British, it would have been one of the most controllable select-fire rifles ever made. However, geopolitics intervened.

For additional background on the rifle’s origins and development, explore who made the FN FAL.

The United States, led by the Ordnance Department, insisted that the new NATO standard cartridge must be a .30-caliber round with power similar to the .30-06. They pushed for the T65 cartridge, which eventually became the 7.62x51mm NATO. To ensure standardization across the alliance, FN was forced to redesign the FAL to accommodate the larger, more powerful American-backed round. This changed the character of the rifle forever, turning it from a controllable carbine into a heavy-hitting battle rifle.

7.62 NATO vs. .308 Winchester: Know the Difference

One of the most common questions from civilian owners and preppers is whether an FN FAL can safely shoot commercial .308 Winchester ammunition. While the external dimensions are virtually identical, they are not the same cartridge.

For additional ammunition background, review this explanation of what caliber a .308 rifle uses.

Pressure and Casing Thickness

Commercial .308 Winchester is often loaded to higher pressures than 7.62 NATO. Furthermore, military 7.62 NATO brass is typically thicker to withstand the violent extraction cycles of machine guns and semi-auto rifles like the FAL. If you use thin commercial brass in a rifle with a generous military chamber, you run the risk of a case head separation or other mechanical failures.

Headspace Considerations

Military rifles are often built with "longer" headspace to ensure reliability even when the rifle is dirty or the ammunition is slightly out of spec. The FN FAL uses a tilting bolt design, and its headspace is set using a specific "locking shoulder" (a hardened steel pin of varying thicknesses). If your FAL is timed and headspaced for military surplus 7.62 NATO, shooting high-pressure commercial .308 could lead to excessive wear or safety issues.

Field Note: Always check the headspace of a surplus or kit-built FAL with proper gauges before firing. If you plan to shoot .308 Winchester exclusively, ensure your locking shoulder is sized to keep the headspace within civilian specifications.

Ballistic Performance: What the Round Delivers

When you chamber a 7.62x51mm round in an FAL, you are carrying a tool capable of reaching out across a valley or punching through a vehicle door. The ballistics of the standard M80 Ball round are impressive even by modern standards.

For a broader look at rifle-caliber performance, read how powerful a .308 rifle can be.

1. Effective Range: While the 5.56mm is often pushed to its limit at 400 yards, the 7.62 NATO remains effective well past 600 yards. In the hands of a marksman, an FAL with a decent optic can reliably hit man-sized targets at 800 yards.
2. Terminal Energy: At 300 yards, the 7.62 NATO round still carries more energy than a 9mm handgun does at the muzzle. This "thump" is what made the FAL the preferred choice for soldiers in the bush wars of Africa and the mountains of South America.
3. Penetration: The heavy projectile is less prone to deflection by light brush or glass. In a defensive or tactical scenario, being able to engage a threat behind cover is a significant advantage.

For those in our Captain or Major tiers who receive high-quality medical or survival gear, you understand that being prepared means having the right tool for the most demanding environment. The 7.62 NATO round is that tool for long-range engagements and hard-target interdiction.

Readers who want foundational field equipment can see what’s inside the Captain crate before choosing a subscription level.

Tuning the FAL: The Adjustable Gas System

The FAL's relationship with its ammunition is unique because of its adjustable gas regulator. Unlike the AR-15, which uses a fixed gas port, the FAL allows the operator to control how much gas is used to cycle the action and how much is vented into the atmosphere.

This system was designed so that soldiers could keep their rifles running regardless of the ammunition quality. If you are using underpowered surplus ammunition, you can "close" the regulator to direct more gas into the piston. If you are using high-pressure rounds in a clean rifle, you can "open" the regulator to vent excess gas, reducing recoil and wear on the internal components.

For more platform-specific background, read how the FN FAL works.

How to Tune Your Gas System

Step 1: Open the regulator completely so that the rifle fails to cycle (short-strokes).

Step 2: Fire a single round, then close the regulator by one click.

Step 3: Repeat until the bolt locks back on an empty magazine.

Step 4: Close the regulator two additional clicks to provide a "functional margin" for adverse conditions.

Key Takeaway: The FAL’s gas regulator is its greatest strength. It allows the rifle to shoot various 7.62 NATO loads reliably while minimizing the physical toll on the shooter and the firearm.

Magazines and Feed Reliability

The round is only as good as the magazine that feeds it. The FN FAL uses two primary types of magazines, which are determined by the rifle's pattern: Metric or Inch.

• Metric Pattern: These are the most common magazines globally. They have a small, stamped front lug. They are used in Belgian, Brazilian, and most European/African FALs.
• Inch Pattern (L1A1): Used by Commonwealth nations like the UK, Australia, and Canada. These have a much larger, machined front lug.

While most Inch pattern rifles can use Metric magazines, though they may be slightly loose, Metric rifles cannot use Inch magazines because the larger lug will not fit into the magwell. For an operator building a loadout, ensuring magazine compatibility is as critical as choosing the right ammunition.

To organize magazine carriers, slings, and supporting equipment, browse the Gear Shop.

Modern Loads and the FAL

While the FAL was built for 147-grain M80 Ball, modern ammunition technology has expanded its capabilities. Today, operators can find 7.62 NATO loads designed for specific mission sets:

• 168-grain OTM (Open Tip Match): While the FAL is not typically a "sub-MOA" (Minute of Angle) rifle, using match-grade 168-grain ammunition can significantly shrink your groups.
• AP (Armor Piercing): Military surplus AP rounds are designed for specialized military applications and may be subject to legal restrictions.
• Subsonic Loads: Shooting 7.62 NATO suppressed with subsonic ammunition turns the FAL into a surprisingly quiet platform, though it usually requires manual cycling as there isn't enough gas to run the piston.

At Crate Club, we often include EDC (Everyday Carry) essentials and tactical tools that complement a heavy-caliber setup. Whether you are carrying a Lieutenant tier fire starter or a Major tier high-lumen flashlight, your gear needs to be as reliable as the FAL’s short-stroke piston system.

The Major tier is designed for readers looking for more advanced equipment and higher-end additions to an established kit.

Performance Under Pressure: Why the Round Still Matters

In a world where many have moved to lighter, faster cartridges, the 7.62x51mm NATO persists for one reason: it works. In a SHTF (S-Hits-The-Fan) scenario or a long-term survival situation, the ability to harvest large game and defend a perimeter from distance is invaluable.

The FAL is a heavy rifle, and the ammunition is heavy. A standard loadout of 100 rounds (five 20-round magazines) weighs significantly more than 100 rounds of 5.56mm. However, the trade-off is the certainty that when you pull the trigger, the round will go through most common barriers and deliver decisive terminal performance.

For more ammunition logistics guidance, see how many rounds come in an ammunition case.

Bottom line: The FN FAL shoots the 7.62x51mm NATO round, a cartridge that provides a balance of range, power, and availability for the serious prepper and tactical enthusiast.

Building Your Loadout

If you are running an FAL as your primary battle rifle, your support gear needs to be up to the task. This isn't a setup for "sissy stuff." You need a robust sling, a high-quality maintenance kit, and a way to carry those heavy magazines.

We recommend focusing on:

• A Quality Sling: The FAL is an 8 to 10-pound rifle. A wide, padded sling is essential for long-range patrols or extended carry.
• Maintenance Tools: The 7.62 NATO round is "dirty" by nature. Ensure you have a proper cleaning kit that includes a gas tube brush.
• Optics: While the iron sights on an FAL are functional, a low-power variable optic (LPVO) allows you to truly take advantage of the 7.62 round's reach.

For practical guidance on organizing magazines, medical supplies, and support tools, read what to carry in a tactical vest.

Our General tier members often see the kind of high-end tactical equipment—from custom bag inserts to premium optics—that turns a standard rifle into a professional-grade defensive system. When you are shooting a round as capable as the 7.62 NATO, you want gear that can keep pace with its performance.

You can explore the General tier when your equipment needs extend beyond basic preparedness.

Conclusion

The FN FAL remains a legendary platform because it was built around a legendary round. The 7.62x51mm NATO cartridge transformed the FAL into a tool that could hold its own in every environment from the deserts of the Middle East to the jungles of Southeast Asia. Understanding the nuances of this caliber—its pressure differences compared to the .308 Winchester, its ballistic advantages, and how to tune your rifle’s gas system to handle it—is what separates a casual shooter from a true operator.

Preparing yourself with the right knowledge is only half the battle. You also need the right gear. Crate Club provides a steady stream of Spec Ops-vetted tactical and survival equipment, hand-picked by professionals who know what it’s like to rely on their kit in the field. Whether you are just starting your journey with the Lieutenant tier or you want the top-of-the-line equipment found in our General tier, we are here to help you build your subscription.

Invest in your skills, understand your caliber, and stay ready for whatever comes next.

FAQ

Can I shoot .308 Winchester in my FN FAL?

In most cases, yes, but you should do so with caution. Commercial .308 Winchester is often loaded to higher pressures than 7.62 NATO, and the brass is thinner. It is highly recommended to have a gunsmith check your rifle's headspace to ensure it can safely handle the slightly different dimensions of commercial .308.

Is the FN FAL still used by any militaries today?

Yes, while it has been replaced as the primary service rifle in most major Western militaries, it remains in use in various capacities across South America, Africa, and parts of Asia. It is often used by reserve units, border guards, or as a designated marksman rifle due to its powerful 7.62 NATO chambering.

How many rounds does a standard FN FAL magazine hold?

The standard military magazine for the FN FAL holds 20 rounds of 7.62x51mm NATO. There are also 30-round magazines available, originally designed for the L4 Bren light machine gun, but they are significantly heavier and can sometimes impact the rifle's balance and reliability.

What is the difference between Metric and Inch pattern FAL ammunition?

There is no difference in the ammunition itself; both patterns shoot 7.62x51mm NATO. The "Metric" and "Inch" designations refer only to the dimensions used during the manufacturing of the rifle and its components, most notably the magazines. You can use the same 7.62 NATO rounds in both a Belgian Metric FAL and a British L1A1 Inch-pattern rifle.