For suppressed rifles, the Hornady Subsonic Sub-X .338 ARC 307gr Sub-X, 20-Round Box (brand part no. 82272) gives Hornady shooters a .338 ARC option that is tuned to stay below the sound barrier for quiet, suppressed shooting. Each round drives a 307-grain Sub-X expanding subsonic bullet. Stock up once and you have a repeatable answer for suppressed rifles. Hornady backs the load with consistent quality control from lot to lot, so what you pattern or zero with today is what ships in the next case.

Key Specifications

• The chambering is .338 ARC, a chambering purpose-built to run quiet subsonic loads through a suppressor.
• The bullet weighs 307 grains, a heavy-for-caliber weight that keeps the bullet subsonic while retaining energy.
• The bullet is a Sub-X expanding subsonic, the terminal design behind the load.
• Staying below the speed of sound keeps a suppressed rifle quiet without the crack of a supersonic round.
• The case is Brass, the reliable standard for consistent chambering and reloading.
• Each box holds 20 rounds, enough to run a full suppressed range session.
• Cost per round runs about $1.51, useful for budgeting a range day or a season of practice.
• The box ships at about 1.307 lb, handy for estimating flat-rate shipping on a bulk order.
• A case holds 10 boxes (200 rounds total), letting you order in bulk without repeat checkouts.

Frequently Asked Questions

Do I need a suppressor to shoot the Hornady Subsonic Sub-X .338 ARC? No, it will cycle in any properly functioning firearm chambered for it, but it’s loaded specifically to stay below the speed of sound, so it’s quietest and most effective through a suppressed barrel.

Does the Sub-X expanding subsonic bullet expand on impact? Yes, it’s engineered to expand reliably on impact for a wider wound channel and faster energy transfer.

What is the case made of? It uses a brass case, the reliable standard for consistent chambering and reloading.

Buy the Hornady Subsonic Sub-X .338 ARC

Pair it with a suppressed build and this load will do the quiet work it is designed for. Browse more rifle ammunition while you shop, or add this load to your cart now. Order from our Lubbock, Texas gun shop and it ships fast to your door.