The Sellier & Bellot .300 Winchester Magnum 190 Grain HPBT Match ammunition (part number V340422) is factory centrefire ammunition engineered for extreme-distance accuracy, benchrest disciplines, and precision target engagement. Featuring a 190-grain (12.30-gram) Hollow Point Boat-Tail projectile, this cartridge achieves a factory-tested muzzle velocity of 868 m/s (2,848 fps) and generates 4,634 Joules (3,421 ft·lb) of muzzle energy from a standard 600 mm barrel. The streamlined match meplat and boat-tail base produce an aerodynamic G1 ballistic coefficient of 0.521 (G7 of 0.267), minimising wind deflection and maintaining supersonic flight out past extended target ranges. Each box contains 20 rounds assembled with reloadable Boxer-primed brass casings and clean-burning propellant for reliable, uniform chamber pressures across standard SAAMI and CIP chambers.

Key Features

• 190-Grain HPBT Projectile: Combines an open-tip match meplat with a boat-tail base to minimise drag, yielding a 0.286 lb/in² sectional density and a 0.521 G1 ballistic coefficient.
• Consistent Downrange Velocity: Delivers a muzzle velocity of 868 m/s, maintaining supersonic stability and retention of energy out to 1,000 yards (914 metres).
• Reloadable Match Brass: Constructed with factory-annealed, Boxer-primed brass casings that can be reloaded for extended shooting regimens.
• Precision Loading Tolerances: Manufactured to an overall cartridge length of 84.80 mm to fit standard internal magazines and CIP/SAAMI .300 Win Mag chambers.

Specifications

• Calibre: .300 Winchester Magnum (.300 Win Mag / 7.62×67mmB)
• Bullet Type: Hollow Point Boat-Tail (HPBT Match)
• Bullet Weight: 190 grains (12.30 grams)
• Bullet Diameter: 0.308 in (7.82 mm)
• Muzzle Velocity: 868 m/s (2,848 fps) from a 600 mm barrel
• Muzzle Energy: 4,634 Joules (3,421 ft·lb)
• Ballistic Coefficient: G1 = 0.521 / G7 = 0.267
• Sectional Density: 0.286 lb/in²
• Cartridge Overall Length: 84.80 mm
• Optimal Barrel Twist Rate: 1:9.5 inches (1 in 241 mm)
• Package Quantity: 20 rounds per box (approx. 0.68 kg total weight)

Who is the S&B Sellier & Bellot 300 Win Mag 190 Grain Bthp Match Ammo 20 Rd for?

• Long-range precision target shooters — Requires high wind-deflection resistance and flat downrange flight paths, provided by this .300 Win Mag match ammunition through an aerodynamic G1 ballistic coefficient of 0.521.
• Benchrest shooting competitors — Relies on consistent ignition and high kinetic transfer, delivered by this 300 Win Mag match ammunition producing an initial velocity of 868 m/s for repeatable shot placement.
• Shooters conducting long-range rifle training — Needs the predictable exterior ballistics of a heavy 190-grain match projectile engineered to stabilise effectively in rifles equipped with a 1:9.5-inch barrel twist rate.

Less suitable for: Medium-to-large game hunting, because this hollow point boat-tail projectile is engineered exclusively for aerodynamic flight rather than controlled expansion, requiring controlled-expansion hunting ammunition instead; similarly, rifles with barrel twist rates slower than 1:9.5 inches struggle to stabilise this 190-grain bullet, requiring lighter match projectiles such as a 168-grain HPBT.