The Hornady Subsonic .338 ARC 307gr Sub-X load is a .338 ARC subsonic rifle cartridge from Hornady (part no. 82272), packed 20 rounds to the box. It is loaded with a 307-grain Sub-X bullet, a lead-core design with a grooved gilding metal jacket and a patented Flex Tip insert in the hollowpoint. Hornady lists a muzzle velocity of 1050 fps from a 16-inch test barrel, which keeps the load below the speed of sound. Powders are selected for consistency from lot to lot, and the load has a low flash signature for suppressed or unsuppressed shooting. It suits shooters who want a quiet, accurate rifle load with reliable expansion at low velocity.

Key Specifications

• Caliber is .338 ARC, the chambering Hornady lists for this load.
• Bullet weight is 307 grains, the weight Hornady lists for this item.
• The bullet is the Sub-X, which Hornady builds with a lead core for subsonic rifle loads.
• Long grooves in the gilding metal jacket combine with the flat profile of the bullet to help it expand at low velocities.
• A patented Flex Tip insert sits in the hollowpoint cavity to help the bullet expand reliably at low velocities.
• Muzzle velocity is 1050 fps from a 16-inch test barrel, per Hornady’s published data for this item.
• Muzzle energy is 752 ft-lb, measured from the same 16-inch test barrel.
• At 300 yards Hornady lists 901 fps and 554 ft-lb, which shows how the subsonic load carries downrange.
• Hornady selects the powders for optimal performance and consistency from lot to lot.
• The load has a low flash signature, which Hornady says suits either suppressed or unsuppressed use.

Frequently Asked Questions

What makes the Sub-X bullet different? Hornady describes a lead core, long grooves in the gilding metal jacket, a flat profile and a patented Flex Tip insert in the hollowpoint, all meant to help it expand reliably at low velocities.

Is this .338 ARC load suppressor friendly? Hornady says its Subsonic ammunition has a low flash signature and suits either suppressed or unsuppressed use, and that paired with a suppressor it is even quieter.

What velocity does Hornady list? Hornady lists 1050 fps and 752 ft-lb at the muzzle from a 16-inch test barrel, falling to 901 fps at 300 yards.

Buy the Hornady Subsonic .338 ARC 307gr Sub-X Rifle Ammunition, 20-Round Box

Shooters who plan around published numbers get a clear picture from this .338 ARC load, because Hornady lists its test-barrel velocity and energy. Browse more rifle ammunition and order from our Lubbock, Texas gun shop for fast, insured shipping to your door.