The Sellier & Bellot .357 Magnum 158 Grain SP NONTOX ammunition (Model V311342) is a factory-loaded centrehole cartridge supplied in 50-round boxes. Built for both revolvers and lever-action rifles chambered in .357 Magnum, it combines a traditional Soft Point (SP) projectile with Sellier & Bellot's patented NONTOX primer technology. This priming formulation eliminates airborne heavy metals—specifically lead, barium, mercury, and antimony—upon ignition to maintain air quality in enclosed facilities. Downrange, the exposed lead core paired with a CuZn 10 tombac jacket delivers controlled expansion upon impact while producing standard factory operating pressures.

Key Features

• NONTOX Heavy-Metal-Free Priming: Employs a patented toxic-metal-free primer compound that removes lead, barium, mercury, and antimony discharge at the firing point.
• Controlled Terminal Expansion: Features an exposed lead Soft Point (SP) design that mushrooms reliably upon impact for effective energy transfer.
• Cleaner Bore Performance: Formulated to reduce airborne particulates and barrel fouling during sustained firing sessions.
• Platform Compatibility: Safely chambers in all standard factory .357 Magnum firearms, including handguns and lever-action carbines, with an overall length of 40.39 mm.

Technical Specifications

• Calibre: .357 Magnum
• Bullet Type: Soft Point (SP) with CuZn 10 jacket
• Bullet Weight: 158 grains (10.25 g)
• Overall Cartridge Length: 40.39 mm (1.590 in)
• Total Cartridge Weight: 15.70 g
• Ballistic Coefficient (G1): 0.184
• Power Factor: 199.6 kgr·fps
• Muzzle Velocity: 385 m/s (1,263 fps) from a 150 mm test barrel
• Muzzle Energy: 760 J (560 ft-lb)
• Velocity at 50 m: 347 m/s (Energy: 616 J)
• Velocity at 100 m: 319 m/s (Energy: 522 J)
• Drop Trajectory (25 m Zero): –3.1 cm at 50 m; –25.1 cm at 100 m
• Packaging: 50 rounds per box

Who is the S&B Sellier & Bellot 357 Mag 158 Grain Sp Nontox Ammo 50 Rd for?

• Indoor shooting range shooters — Requires the elimination of airborne heavy metals in enclosed bays, utilising a heavy-metal-free primer that discharges this 158-grain 357 Magnum handgun ammunition cleanly without releasing lead, barium, or antimony.
• Pest hunters using 357 Magnum lever-action carbines — Demands reliable short-to-medium range terminal performance, delivering a muzzle velocity of 385 m/s and 760 J of muzzle energy paired with a 0.184 G1 ballistic coefficient for controlled expansion out to 100 metres.

Less suitable for: Target engagements at distances exceeding 100 metres where bullet drop reaches –25.1 cm, requiring flatter-shooting high-velocity rifle cartridges, or jurisdictions requiring 100 percent monolithic copper projectiles, where solid non-lead hunting rounds are required instead of exposed lead-core soft points.