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Hornady Black .338 ARC ammunition loads the proven Monoflex bullet into clean-burning ammunition that functions flawlessly across AR-15 platforms. Whether you're running suppressed or unsuppressed, this round cycles reliably without requiring gas system adjustments. The 170-grain Monoflex bullet combines a copper alloy construction with a polymer-tipped design that initiates expansion on impact while retaining 95 percent of its weight for deep, ethical penetration.
This isn't a universal rifle load adapted for the .338 ARC. Hornady engineered the entire cartridge and ammunition system for the platform from the ground up. The case geometry and powder charge work together to deliver consistent velocity and accuracy, with measurably tighter velocity spreads than competing subsonic-focused cartridges. You get the benefit of Monoflex's solid-copper construction without the pressure and fouling issues that solid-copper bullets sometimes create in other platforms.
The Monoflex bullet differs from traditional jacketed designs in a key way: it's a one-piece copper alloy projectile that won't separate on impact. The Flex Tip polymer insert initiates reliable expansion without relying on high velocities, which matters if you're pushing this round through a suppressor or taking longer shots at game. This combination delivers consistent wound channels and deep, penetrating performance on medium game out to practical .338 ARC distances.
Loaded to 2075 fps from a 16-inch barrel, the 170-grain load drops about 4.2 inches high at 100 yards when sighted for 200, and sits roughly 16 inches low at 300 yards. That's flat enough for practical hunting work on deer and varmints to around 250 yards, with plenty of retained energy. The round works equally well suppressed, making it a solid all-rounder if you're running both cans and naked at different times.
Yes, this load is specifically designed to function reliably with and without a suppressor. The .338 ARC platform was engineered to work suppressed or unsuppressed without requiring gas system changes. Just verify your suppressor bore is .338 caliber or larger to accommodate the bullet diameter. Large .45-cal cans, .338-cal cans, and some higher-pressure 9mm suppressors all work with this round.
At 2075 fps with over 1600 foot-pounds of energy, this round is effective for deer, hogs, and varmints out to approximately 250 yards. The trajectory is reasonable for AR-15 shooting, dropping about 16 inches at 300 yards when zeroed at 200. For hunting situations, most would comfortably use it to 200 yards.
The 170-grain Monoflex is the supersonic hunting and varmint load. Hornady also offers a subsonic 307-grain option designed for suppressed, short-range work. The 170-grain sits in the middle, giving you reasonable trajectory and energy for medium-range work. The Monoflex bullet's copper alloy construction prevents separation and retains 95 percent of its weight for consistent penetration.
Yes, .338 ARC requires 6.5 Grendel-family magazines or ones specifically marked for .338 ARC. Standard 5.56 NATO magazines will not feed .338 ARC reliably. ASC, Lancer L5, and DuraMag brand 6.5 Grendel mags are confirmed to work well with this cartridge. Some 400 Legend magazines are also compatible.
| UPC | 090255822731 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 82273 |
| Bullet Weight (Grains) | 170 |
| Caliber/Gauge | .338 ARC |
| Case Material | Brass |
| Grains | 170 gr |
| Model | |
| Product Type | MonoFlex |
| Shipping Weight | 0.952 |
| Units per Box | 20 |
| Cost per Round | 1.95 |
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