Solid Copper 5.56: Dominate Your Next Hunt with the 62-Grain REX Round

When the stakes are high and the hogs are running, you need ammunition that delivers lethal precision, unstoppable power, and absolute reliability.

Enter the solid copper 5.56 62-grain REX (Rapid EXpanding) from HOP Munitions—the ultimate hunting solution for AR-15 enthusiasts. With devastating energy transfer and rapid expansion, this round is designed to hunt smarter, hit harder, and bring down even the toughest game.

Whether you’re protecting farmland from feral hogs or chasing that trophy boar, the solid copper 5.56 REX offers a game-changing advantage. Here’s why it’s the ammo you need to dominate your next hunt.

Why the Solid Copper 5.56 REX Stands Out

HOP Munitions has a reputation for delivering high-performance ammunition that shooters trust, and the 62-grain Solid Copper REX is no exception. With a design that maximizes both penetration and expansion, this cartridge combines innovation with practical hunting performance.

Key Performance Specs

• Caliber: 5.56 NATO
• Bullet Type: Solid Copper REX (Rapid EXpanding)
• Grain Weight: 62
• Muzzle Velocity: 2,870 fps
• Muzzle Energy: 1,134 ft/lbs
• Ballistic Coefficient: .300
• Sectional Density: .177
• Packaging: Sold in boxes of 50

This is more than just numbers on a spec sheet. These features translate into real-world results, delivering accuracy and knockdown power that make a difference in the field.

Unmatched Power and Precision

Devastating Energy Transfer

With a muzzle velocity of 2,870 fps and a hard-hitting energy output of 1,134 ft/lbs, the solid copper 5.56 REX ensures lethal terminal performance. This means clean, ethical kills with maximum efficiency.

Exceptional Accuracy

A .300 ballistic coefficient paired with a sectional density of .177 ensures the Solid Copper 5.56 REX delivers flat trajectories and pinpoint accuracy. Whether shooting at 50 yards or 500 yards, this ammo performs consistently.

• Drag Function: G7
• Zero Range: 100 yards
• Chart Range: 500 yards

Eco-Friendly and Effective

Manufactured from solid copper, this round is lead-free, offering an environmentally friendly option without sacrificing performance. The Rapid EXpanding design minimizes over-penetration, delivering effective and lethal results on target.

Designed for AR-15 Platforms

The solid copper 5.56 REX is optimized for AR-15 platforms, ensuring smooth cycling, reliable feeding, and consistent performance.

Its 62-grain projectile strikes the perfect balance between speed, stability, and stopping power, making it an ideal choice for hunters who demand versatility and precision.

But what sets this round apart from the more common 55-grain and 77-grain options, or even the standard NATO 62-grain M855? Let’s break it down.

Advantages Over 55-Grain Ammo

The 55-grain projectile, like the popular M193, is known for its higher velocity and flatter trajectory at shorter ranges. However, its lighter weight makes it less effective for penetration and energy transfer on larger game, especially at extended distances.

The 62-grain Solid Copper REX bridges the gap by offering:

• Increased sectional density (0.177): Provides better penetration, especially on tough-skinned targets like hogs.
• Enhanced stability: The heavier weight performs better in windy conditions and at longer ranges, maintaining accuracy and energy.
• Controlled expansion: Unlike the fragmentation tendencies of the 55-grain round, the solid copper REX is designed to expand upon impact, delivering ethical kills with minimal over-penetration.

For hunters using AR-15s, the 62-grain REX offers the precision and knockdown power the 55-grain round often lacks, making it the superior choice for medium to large game.

Comparison to the 77-Grain Ammo

The 77-grain projectiles, particularly the 77-grain Hollow Point Boat Tail (HPBT) rounds, are known for their exceptional long-range accuracy and heavier impact. These match-grade bullets are often the choice for precision shooters and long-distance engagements. However, when it comes to hunting applications—especially hog hunting with an AR-15—there are some important considerations:

• Velocity Trade-off: Heavier bullets like the 77-grain HPBT typically have a lower muzzle velocity compared to lighter bullets. This can result in reduced energy transfer at common hunting distances, potentially affecting terminal performance on game at closer ranges.
• Trajectory Arc: While the 77-grain bullets have a higher ballistic coefficient, which helps maintain velocity over longer distances, they also exhibit a steeper trajectory arc. This means more pronounced bullet drop, requiring more precise range estimation and adjustments.
• Overpenetration Risks: The 77-grain HPBT is designed for maximum stability and accuracy, but it may not expand as reliably upon impact when hunting medium-game. This can lead to overpenetration, where the bullet passes through without transferring optimal energy, resulting in less effective terminal performance.
• Twist Rate Requirements: To stabilize heavier bullets like the 77-grain HPBT, a faster barrel twist rate (typically 1:7 or 1:8) is required. Rifles with slower twist rates (like 1:9) may not stabilize these bullets effectively, leading to decreased accuracy.

By choosing the 62-grain Solid Copper 5.56 REX, hunters gain the benefits of higher velocity, reliable expansion, and ease of use in standard AR-15 platforms.

This makes it a more practical and effective choice for hog hunting compared to the heavier 77-grain HPBT rounds, which are better suited for specialized long-range shooting rather than hunting applications.

62-Grain REX vs. NATO 62-Grain M855

The NATO M855 (62-grain “green tip”) is a standard military round featuring a steel penetrator core designed for use against lightly armored targets. While it offers adequate performance for general-purpose shooting, it has limitations when applied to hunting:

• Poor expansion: The M855’s steel core reduces its ability to expand, often resulting in over-penetration and less energy transfer on soft targets.
• Environmental concerns: The M855 contains lead, making it less eco-friendly compared to lead-free options.

The 62-grain Solid Copper REX outshines the M855 by delivering:

• Controlled expansion: Its Rapid EXpanding (REX) design ensures devastating energy transfer while minimizing over-penetration, ideal for hog hunting.
• Lead-free construction: Solid copper rounds are safer for the environment and comply with hunting regulations in areas that restrict lead-based ammunition.
• Precision engineering: With a ballistic coefficient of 0.300, the REX round offers superior accuracy and trajectory stability over the M855.

Why Choose HOP Munitions for Solid Copper 5.56 Ammo?

At HOP Munitions, we understand that hunters, law enforcement professionals, and competitive shooters demand excellence from their gear.

That’s why every product we create is meticulously designed to deliver reliability, precision, and power. The 5.56 Solid Copper REX is a testament to our commitment to innovation and performance.

This new round provides the perfect balance of speed, accuracy, and energy.

It bridges the gap between the lighter 55-grain round and the heavier 77-grain loads while delivering unmatched performance over the NATO M855.

Dominate the Hunt with Solid Copper 5.56 Ammo

Step into the field with confidence and the best ammunition in your AR-15.

With the solid copper 5.56 REX, you’ll experience unmatched power, precision, and lethal performance on every hunt. Try it today and see the difference for yourself.