Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For shooters running bolt-action 8mm Mauser rifles, the 8x57mm JS Mauser ammo from Sellier & Bellot brings 196 grains of jacketed soft point projectile, 2,591 fps at the muzzle, and 2,922 ft-lbs of energy per round. The JS designation refers to the .323-inch bullet diameter standard for military and sporting Mauser actions — distinct from the less-common JRS rimmed variant built for double-barrel rifles. Sellier & Bellot loads this cartridge in boxer-primed, reloadable brass cases with non-corrosive primers, maintaining the company’s production standards established in 1825 and carried forward under CBC/Magtech ownership since 2009.
Load Profile
Sellier & Bellot manufactures this 8x57mm JS load with a 196-grain jacketed soft point bullet — a semi-jacketed design featuring a cut-through edge in the jacket that partially locks the lead core. The bullet deforms proportionally to target resistance: lighter expansion in thin-skinned game, greater expansion in heavier-bodied animals. At 2,591 fps and 2,922 ft-lbs from the muzzle, this supersonic load sits in the middle of the 8mm Mauser performance envelope, offering sufficient energy for medium game while remaining manageable in standard bolt-action platforms. Brass cases accept standard large rifle primers during reloading; boxer primer pockets simplify decapping and repriming.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 8x57mm JS Mauser (8mm Mauser) (323 Diameter) |
| Bullet weight | 196 Grains |
| Bullet type | Jacketed Soft Point |
| Muzzle velocity | 2591 Feet Per Second |
| Muzzle energy | 2922 Foot Pounds |
| Rounds/box | 20 Round |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Velocity rating | Supersonic |
| Intended use | Range & Target |
| Manufacturer | Sellier & Bellot |
The 8x57mm JS Mauser cartridge requires rifles chambered specifically for the .323-inch bullet diameter; earlier rifles chambered for the .318-inch J-bore should not fire JS ammunition. Verify your rifle’s chamber designation before ordering. For more 8mm Mauser options, browse our full 8mm Mauser ammo selection.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Treat every firearm as if it is loaded; keep muzzle pointed in a safe direction at all times.
- Verify applicable federal, state, and local laws governing ammunition purchase, possession, and transport in your jurisdiction before ordering.
- This ammunition contains lead; California Proposition 65 requires disclosure of potential reproductive harm and cancer risk from lead exposure. Store ammunition in a cool, dry environment and wash hands after handling.
Reviews
There are no reviews yet.