458 socom ammo

458 SOCOM ammo turns a standard AR-15 into a big-bore thumper — a .458-inch cartridge that delivers heavy-bullet, close-range knockdown power from the familiar AR platform with only a barrel, bolt, and magazine change. Developed for special-operations use, it fires everything from fast 300-grain supersonic loads for hogs and big game to heavy 500- to 600-grain subsonic loads built for suppressed shooting. If you want serious bore size and energy in an AR, the .458 SOCOM is the answer. This page covers what it does and how it compares.

Tatted Tacticals stocks .458 SOCOM from Underwood, Hornady, Black Butterfly, and SBR — supersonic hunting loads and heavy subsonic, in boxes and bulk.

What the .458 SOCOM Does Best

This is a close-range, heavy-hitting cartridge. Supersonic 300-grain loads near 1,900 fps deliver around 2,400 ft-lbs for hogs, deer, and big game inside about 150–200 yards, while heavy 500- to 600-grain subsonic loads pair with a suppressor for quiet, deep-penetrating performance. It uses standard AR-15 lowers and magazines (with a single-stack feed), so building one is straightforward. The trade-offs are limited range, reduced magazine capacity, and higher ammo cost. Our .458 SOCOM ballistic data guide compares supersonic and subsonic loads.

.458 SOCOM vs. .308 and Other Big Bores

The .458 trades range for close-range mass. Against the .308, it delivers far more close-range energy and bullet diameter but drops fast and is a short-range cartridge. Among AR big bores, the .450 Bushmaster is its closest rival, and the .300 Blackout offers a smaller-bore subsonic option on the same platform. For lever-gun big-bore power, see the .45-70; for standard AR rounds, the 5.56. Standards follow SAAMI specifications.

Buying .458 SOCOM

As a specialty cartridge, .458 SOCOM costs more and is lower-volume, so buy your supersonic and subsonic loads when available. Federal law sets the minimum age for rifle ammunition at 18; per ATF guidance, confirm federal rules and review our ammunition shipping rules and state restrictions before ordering.

.458 SOCOM Ammo — Frequently Asked Questions

What is .458 SOCOM good for?

Close-range big-game and hog hunting and suppressed shooting from an AR-15. Supersonic loads deliver heavy-bullet knockdown on hogs and deer inside about 200 yards, while heavy subsonic loads excel for quiet, deep-penetrating suppressed work. It’s a short-range power cartridge, not a long-range round — ideal where big bore size matters more than reach.

Is .458 SOCOM better than .308?

At close range it delivers far more energy and a much larger bullet, making it superior for heavy close-range hits and suppressed subsonic shooting. But the .308 shoots flat and stays effective to far greater range. For brush-country big game and suppressed AR use the .458 wins; for versatility and distance the .308 does.

Does .458 SOCOM kick hard?

It has noticeable recoil — more than a 5.56 or .300 Blackout AR — given the heavy bullets and energy, but it’s manageable in a properly built AR with a good muzzle device and is far milder than its energy suggests thanks to the platform’s weight and buffer system. Most shooters find it stout but comfortable.

What does a .458 SOCOM need on an AR-15?

A .458 SOCOM upper uses a standard AR-15 lower but requires a .458-specific barrel and bolt, and feeds from standard AR magazines single-stacked (typically about 7–10 rounds). No lower modification is needed. That drop-in-upper compatibility is a big part of its appeal — big-bore power on your existing AR lower.

Can you buy .458 SOCOM ammo online?

Yes. In most U.S. states you can buy .458 SOCOM online and have it shipped to your door. The minimum age for rifle ammunition is 18, and some states and municipalities add restrictions or shipping limits, so confirm your state and local laws before ordering.