The Sellier & Bellot 7mm Rem Mag 175 Grain SBT Sierra Boat Tail ammunition is engineered for long-range performance on medium-to-large game. Loaded with the Sierra GameKing Spitzer Boat Tail (#1940) bullet, this factory centrefire cartridge combines match-grade aerodynamic efficiency with controlled terminal expansion. Pushing a 175-grain projectile at a muzzle velocity of 852 m/s (2,795 fps) with 4,120 J of muzzle energy from a standard 610 mm test barrel, it maintains momentum and wind drift resistance well beyond extended shooting distances.

Key Features:

• Sierra GameKing Projectile: Utilises the 175 gr Spitzer Boat Tail bullet with a heavy, double-tapered jacket and lead-alloy core designed for deep penetration and uniform expansion.
• High Ballistic Efficiency: Boasts a G1 ballistic coefficient of 0.562 (G7 0.282) and a 0.310 lb/in² sectional density, minimising atmospheric drag downrange.
• Retained Energy: Retains 645 m/s velocity and 2,359 J of kinetic energy at 400 metres, with a factory Most Recommended Distance (MRD) zero of 178 metres.
• Reloadable Components: Built with non-corrosive boxer primers and standard factory brass casings.

Specifications:

• Calibre: 7mm Remington Magnum (7×63mmB)
• Bullet Type: Sierra GameKing Spitzer Boat Tail (SBT)
• Bullet Weight: 175 grains (11.35 g)
• Bullet Diameter: 0.284 in (7.21 mm)
• Sectional Density: 0.310 lb/in²
• Ballistic Coefficients: G1 = 0.562, G7 = 0.282
• Cartridge Overall Length: 83.50 mm
• Cartridge Weight: 30.1 g per round
• Muzzle Velocity: 852 m/s (2,795 fps)
• Muzzle Energy: 4,120 J (3,039 ft·lb)
• Velocity at 400 m: 645 m/s (approx. 2,116 fps)
• Packaging: 20 rounds per box

Who is the S&B Sellier & Bellot 7mm Rem Mag 175 Grain Sbt Sierra Boat Tail Ammo 20 Rd for?

• Large game hunters — requires the deep bone and tissue penetration provided by a heavy 175-grain bullet with a high 0.310 lb/in² sectional density to reliably anchor large-bodied animals such as Sambar, Red deer, and feral pigs at extended distances.
• Long-range silhouette competitors — relies on the 7mm Remington Magnum cartridge's high G1 0.562 ballistic coefficient and 2,795 fps muzzle velocity to minimise wind deflection and retain sufficient downrange momentum to topple heavy steel targets at 400 metres and beyond.

Less suitable for: Light game or strictly short-range brush hunting, where this 175 gr heavy bullet risks full pass-throughs without full energy transfer; lighter, faster-expanding 140–150 gr centrefire rifle cartridges are better suited. It is also unsuitable for rifles with barrel twist rates slower than 1:9.5 inches, which lack the gyroscopic stability required for heavy 175 gr projectiles.