The Sellier & Bellot .300 Winchester Magnum 180 gr eXergy (XRG) Lead-Free Ammunition is engineered for big game hunting, delivering controlled expansion and deep penetration without lead contamination. Constructed from a solid copper-zinc alloy (CuZn 10) fitted with an aluminium front cap and internal radial relief grooves, the monolithic projectile achieves near-100% weight retention upon impact. Launching an 11.70-gram (180 gr) projectile at a muzzle velocity of 887 m/s, it produces 4,603 Joules of muzzle energy from a standard 600 mm test barrel. The non-toxic design ensures straight-line penetration through heavy bone and tissue while preserving meat quality.

Key Features

• Monolithic Copper-Alloy Construction: Machined from solid CuZn 10 brass alloy, eliminating lead fragmentation and retaining virtually all of its mass through dense muscle tissue.
• Aluminium-Capped Cavity: Employs an internal concave cavity with radial grooves and a frontal aluminium tip to initiate consistent, petal-style expansion upon impact.
• Centrefire Magnum Ballistics: Produces 4,603 Joules of muzzle energy ($E_0$) with a G1 ballistic coefficient of 0.275 to 0.287, suited for short- to medium-range hunting up to 250 metres.
• Quality Components: Loaded in reloadable brass cases featuring Boxer large rifle primers, assembled to an overall cartridge length of 84.80 mm.

Specifications

• Calibre: .300 Winchester Magnum (7.62 × 67 mm)
• Bullet Type: XRG (eXergy monolithic copper-alloy expanding projectile)
• Bullet Weight: 180 grains (11.70 grams; Bullet Code #2970)
• Muzzle Velocity ($V_0$): 887 m/s (approx. 2,910 fps) from a 600 mm barrel
• Velocity at Range: 762 m/s at 100 m; 654 m/s at 200 m; 561 m/s at 300 m
• Muzzle Energy ($E_0$): 4,603 Joules (approx. 3,395 ft-lbs)
• Overall Length: 84.80 mm
• Ballistic Coefficient ($G_1$): 0.275 – 0.287
• Most Recommended Distance (MRD): 171 – 175 metres
• Packaging: 20 rounds per box
• Firearms Licensing: Australian Category B centrefire ammunition

Who is the S&B Sellier & Bellot 300 Win Mag 180 Grain Xrg (Exergy) Lead Free Ammo 20 Rd for?

• Large game hunters targeting heavy Australian species — requires massive tissue disruption and deep straight-line penetration delivered by this 300 Win Mag lead free hunting ammunition, generating 4,603 Joules of muzzle energy and driving a 180 grain solid alloy projectile through heavy bone on game such as Sambar deer, scrub bulls, and feral camels.
• Hunters bound by environmental compliance mandates — requires 100 percent lead-free construction for hunting on state forestry land or private estates, utilizing this .300 Winchester Magnum cartridge to launch an 11.70-gram monolithic brass projectile at 887 m/s without risking meat contamination or non-toxic ammunition infractions.

Less suitable for: Long-range hunting extending beyond 300 to 350 metres where terminal velocity drops near the 500–550 m/s threshold required for reliable monolithic bullet expansion (opt instead for high-BC, polymer-tipped lead-free hunting ammunition or thin-jacketed lead centrefire rounds), or for firearms chambered in other .30 calibre magnum cartridges such as .300 WSM, .300 PRC, or .300 Weatherby Magnum.