Which .458 SOCOM Product Lines Are Most Common?
Current observed prices are in the 30-day price summary at the top of this page, recomputed from tracked retailer listings. The table below lists common load types by bullet weight and intended use. It is a reference list, not a ranking.
| Load Type | Bullet Construction | Grain | Use Case |
|---|---|---|---|
| Supersonic hunting | Jacketed Soft Point / Polymer Tip | 250gr–300gr | Deer / Hog |
| Supersonic monolithic | Solid Copper Hollow Point | 250gr–300gr | Hunting (lead-free) |
| Practice | FMJ / Plated Flat Nose | 300gr–350gr | Range / Practice |
| Subsonic | Heavy Jacketed / Hard Cast | 400gr–500gr | Suppressed Shooting / Hunting |
.458 SOCOM is loaded mostly by specialist ammunition companies rather than the largest mass-market brands — names such as SBR Ammunition, Underwood, Steinel, and Ventura Heritage appear frequently in the catalog. The search button at the top of this page shows which are in stock now.
What Is .458 SOCOM?
The .458 SOCOM was developed in 2000 by Marty ter Weeme of Teppo Jutsu, with Tony Rumore of Tromix building the early rifles. The idea came out of informal discussions among special-operations personnel after the 1993 fighting in Mogadishu, where the 5.56mm M4 and M16 were reported to need multiple hits to stop opponents. The goal was a much heavier bullet that could still be fired from the M4/AR-15 platform with only an upper-receiver change.
Key dimensions as published by its designers: bullet diameter 0.458 inches — the same diameter as the .45-70 Government — a case length of 1.575 inches, and an overall length of about 2.26 inches, which fits the AR-15 magazine well. The case has a rebated rim — 0.473 inches, smaller than the case body — so it needs a bolt whose face is sized for that rim rather than the standard 5.56 bolt. The published maximum pressure is 35,000 psi.
How It Works on the AR-15
Converting an AR-15 to .458 SOCOM requires:
- A .458 SOCOM upper receiver and barrel, typically with a larger ejection port.
- A bolt with a face sized for the .458 SOCOM rim, usually supplied with the upper.
- Standard AR-15 lower receiver, buffer, and spring — designed to remain compatible.
- Standard AR-15 magazines, which hold the larger cartridge single-stacked; a 30-round 5.56 magazine holds roughly ten rounds of .458 SOCOM. Some magazines need a follower change for reliable feeding.
How .458 SOCOM Is Used
- Hog and deer hunting at short to moderate ranges with 250gr–300gr bullets at roughly 1,800–1,900 fps.
- Suppressed shooting with naturally subsonic 400gr–500gr loads around 1,000 fps, where the very heavy bullet keeps much of its energy without the supersonic crack — see subsonic vs. supersonic.
- Straight-wall hunting zones: the case is straight-walled, so in some states it meets straight-wall rifle rules. Rules differ by state and zone and change over time — check yours.
Ballistics in Practice
The .458 SOCOM trades range for bullet weight. A 300gr bullet leaving the muzzle near 1,900 fps carries a large amount of energy at short distances, but its relatively blunt, heavy bullet drops quickly compared with a bottleneck rifle cartridge, so most hunting use stays within roughly 150–200 yards. Heavy subsonic loads have an even more curved trajectory and are generally used at shorter distances still. Barrel length matters as well: many .458 SOCOM uppers use 16-inch barrels, while short-barreled versions give up some velocity — published load velocities are measured from a specific test barrel, so a rifle's own chronograph reading is the reliable figure.
How .458 SOCOM Compares
- vs. .45-70 Government: same bullet diameter, longer rimmed case, lever-action and single-shot rifles rather than the AR-15.
- vs. .350 Legend: a smaller, lighter straight-wall AR-15 cartridge with less recoil, designed around deer hunting regulations.
- vs. .300 Blackout: the most common suppressed AR-15 cartridge; far lighter bullets, uses the standard 5.56 bolt.
How .458 SOCOM Prices Compare
The 30-day summary at the top of this page shows the observed price distribution for .458 SOCOM — the median, the quartiles, and how many retailers and listings stand behind them. Because it is produced in small runs by specialist makers, fewer retailers stock it than mainstream AR-15 calibers, and a single retailer's stock changes can move the statistics more than for high-volume calibers. Boxes are usually 20 rounds, but some makers sell 10- or 50-round packs, so compare by cost per round; the search button at the top of this page sorts current listings that way.
Where to Compare .458 SOCOM Prices
IronScout tracks in-stock listings across the retailers it covers and recomputes the 30-day summary daily. Set a free price alert to be notified when a listing crosses a price you choose. For how AR-15 cartridges differ, see AR-15 ammo compared.
Related Calibers
- .45-70 Government — The classic .458-inch rifle cartridge.
- .350 Legend — Straight-wall AR-15 deer cartridge.
- .300 Blackout — The common suppressed AR-15 cartridge.