Description
The Fiocchi 357 Magnum 158gr JHP load, item 357B, is a 50 round box of 357 Magnum ammunition from the Fiocchi Defense Dynamics line, loaded with a 158 grain jacketed hollow point (jhp) bullet rated at 1,220 fps. Some distributors still list it under the older Shooting Dynamics pistol name; Fiocchi now catalogs it in the Defense Dynamics family.

Fiocchi 357 Magnum 158gr JHP Overview
The 158 grain bullet is the traditional 357 Magnum weight, the one most revolvers are regulated for, so it tends to hit close to the sights on fixed-sight guns. Fiocchi rates this load at 1,220 fps, a moderate magnum velocity that delivers real performance without the extreme blast of the hottest loads on the market. The jacketed hollow point is built to expand reliably at revolver and carbine speeds, and the 50 round box makes it practical to train with the same ammunition you keep in the gun.
Fiocchi loads its US product line in Ozark, Missouri, and has made ammunition since 1876.
Intended Use
This is a defensive load. Hollow point bullets are designed to expand on impact, which helps limit over-penetration and transfers energy to the target. Before you carry it, fire enough rounds through your own gun to confirm reliable feeding, extraction and point of impact, and practice with it periodically so the recoil is familiar.

Bullet and Ballistics
Published velocity is measured from a test barrel. Expect lower numbers from snub-nose revolvers and higher numbers from long-barrel revolvers and lever-action carbines. A 158 grain bullet at this speed offers a good balance of penetration and expansion for personal protection. From a carbine, the added velocity improves energy and can push the load into light hunting territory for small to medium game at short range, though a dedicated hunting bullet is the better choice for deer.
Firearm Compatibility
Fire this ammunition only in firearms chambered for 357 Magnum. A 357 Magnum revolver or carbine can also fire 38 Special and 38 Special +P cartridges, which are cheaper and milder for practice. The reverse is never safe: never fire 357 Magnum in a gun chambered only for 38 Special. Lightweight alloy and scandium revolvers may allow bullets to jump forward under recoil, so check with the maker before using full magnum loads in those guns.

Reliability and Testing
Factory ammunition from an established maker is held to consistent standards, but every firearm is a little different. Shoot at least a box through your gun before you rely on any load, and watch for clean primer strikes, smooth feeding and positive extraction. If you shoot more than one load, note where each one prints at your usual distance so you can adjust your sights or holds.
Recoil and Shootability
357 Magnum recoil and muzzle blast are significant, especially from small, light revolvers with short barrels. A steel-frame revolver with a 4-inch barrel tames it well and is a classic home-defense and field setup. Wear good hearing protection; the report indoors is very loud. Practicing with 38 Special and finishing each session with a cylinder of this load keeps you familiar with its recoil and point of impact.
Storage and Care
Store ammunition in a cool, dry place in its original box, away from solvents and lubricants that can contaminate primers. Inspect rounds for dents, loose bullets or corrosion before loading, and set aside anything that looks damaged.
Specifications
- Brand: Fiocchi Ammunition
- Line: Defense Dynamics
- Item number: 357B
- Caliber: 357 Magnum
- Bullet weight: 158 grain
- Bullet type: Jacketed Hollow Point (JHP)
- Rated muzzle velocity: 1,220 fps
- Count: 50 rounds per box
- UPC: 762344709918
Before You Buy
Federal law requires buyers of handgun ammunition to be at least 21 years old when buying from a licensed dealer. Some states and cities restrict ammunition purchases, require background checks or limit shipping, so check your local rules before you order.
Who It Is For
The Fiocchi 357 Magnum 158gr JHP is a great fit for 357 Magnum revolver and lever-gun owners who want a traditional 158 grain hollow point for home defense, carry or field use at a reasonable price.
Buy the Fiocchi 357 Magnum 158gr JHP at MAG5 Firearms
MAG5 Firearms is a family-owned FFL in Collegeville, Pennsylvania. Order the Fiocchi 357 Magnum 158gr JHP online and we will ship it to you where state and local law allow, or browse our full selection of ammunition for more handgun loads. For factory details, visit Fiocchi Ammunition.







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