458 SOCOM Ammo
Shop in-stock 458 SOCOM ammunition with next-business-day shipping. Heavy 300gr and 350gr flat-nose loads from Wilson Combat and HSM for hog hunting, deer, and bear defense from an AR-15. Read more about 458 SOCOM.
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458 SOCOM – 300 Gr RNFP – Wilson Combat (A458-300-RNFP) – 200 Rounds
$539.00
( $2.70 per round ) Add to cart
Overview of 458 SOCOM Ammo
458 SOCOM puts big-bore stopping power in the AR-15 platform. It fires a .458-inch bullet in weights from 250 to 600 grains, with 300gr loads running around 1,900 fps and producing roughly 2,400 ft-lbs of muzzle energy. That is .45-70 class performance from a standard AR-15 lower, using a dedicated 458 SOCOM upper and bolt.
Two practical notes for buyers. First, standard AR-15 magazines work, but they hold far fewer rounds: a 30-round magazine typically holds about 10 rounds of 458 SOCOM. Second, 458 SOCOM has a small shoulder and is not a true straight-wall case, so it may not qualify in states with straight-wall rifle rules for deer. If you hunt in one of those states, look at 350 Legend instead, and always check your state regulations.
458 SOCOM Brands We Carry
- Wilson Combat 458 SOCOM Ammo: 300gr RNFP, a well-balanced load for hogs and deer at AR-15 distances with manageable recoil.
- HSM 458 SOCOM Ammo: 350gr JFP Bear Load, a heavy jacketed flat-nose built for deep penetration on large, tough game and bear defense.
Best 458 SOCOM Ammo for Specific Uses
| Use Case | Top Pick | Also Consider |
|---|---|---|
| Hog and Deer Hunting | Wilson Combat 300gr RNFP | HSM 350gr JFP Bear Load |
| Bear Defense / Large Game | HSM 350gr JFP Bear Load | Wilson Combat 300gr RNFP |
Why Buy 458 SOCOM Ammo from BulkMunitions?
- In stock and ready to ship. We only list ammunition that is physically in our warehouse. No backorders.
- Next-business-day shipping from our Knoxville, TN warehouse on orders placed before our daily cutoff.
- Bulk pricing on a hard-to-find caliber. 458 SOCOM in 200-round cases delivers a far better per-round price than 20-round retail boxes.
- We tithe 10% of profits to Christian-based, 2A-supporting organizations every quarter, and our customers vote on where it goes.
Frequently Asked Questions
Does 458 SOCOM work in a standard AR-15?
Yes, with a dedicated 458 SOCOM upper receiver, barrel, and bolt. The lower receiver stays the same. Standard AR-15 magazines feed 458 SOCOM, but a 30-round magazine holds only about 10 rounds. Dedicated 458 SOCOM magazines or followers can improve feeding reliability.
What is the difference between 458 SOCOM and 450 Bushmaster?
Both put big-bore performance in an AR-15. 450 Bushmaster uses a .452-inch bullet in a true straight-wall case, which makes it legal in many straight-wall deer states. 458 SOCOM uses a .458-inch bullet, handles heavier bullets up to 600 grains, and runs better with subsonic loads, but its small shoulder means it may not qualify under straight-wall rules.
Is 458 SOCOM good for bear defense?
Yes. A heavy flat-nose load like the HSM 350gr JFP Bear Load delivers deep, straight-line penetration and large wound channels, which is what matters on bear. Combined with fast follow-up shots from a semi-automatic AR-15, it is one of the more capable bear defense setups in a carbine.
More About 458 SOCOM Ammo
458 SOCOM was developed around 2000 by Marty ter Weeme of Teppo Jutsu. The idea came from reports following the 1993 Battle of Mogadishu, where special operations troops wanted more stopping power per shot from the M4 carbine without giving up the platform they trained on. The goal was a cartridge that would fit an AR-15 lower and magazine while delivering heavy-bullet performance comparable to .45-70 Government.
The cartridge was never adopted as a military standard, but it found a dedicated following in the civilian market. Hog hunters in particular embraced it, since a semi-automatic rifle firing 300 to 500 grain bullets is well suited to stopping large, tough animals and handling multiple targets quickly. Its ability to run heavy subsonic loads also made it popular with suppressor owners.
Today 458 SOCOM uppers are offered by a number of manufacturers, and loaded ammunition comes from specialty makers like Wilson Combat, HSM, SBR Ammunition, and Underwood. Supply is thinner than mainstream calibers, which is why buying in case quantities when it is in stock makes sense for regular shooters.