The Weatherby 7mm WBY Mag 150gr Swift Scirocco load is a box of 20 rounds of 7mm Weatherby Magnum hunting ammunition built on premium brass (Weatherby part no. F7MM150SCO). Roy Weatherby designed the 7mm Weatherby Magnum in 1944 (production began in 1947) from the 300 H&H case, a belted case that carries the double radius shoulder Weatherby is known for. The Swift Scirocco is a bonded bullet with signature black tips, built for hunting and long-range efficiency, with a progressively tapered pure copper jacket that controls expansion and is bonded to the core. Weatherby publishes a muzzle velocity of 3,225 fps and 3,464 ft-lbs of muzzle energy for this 150-grain load, still carrying 2,331 fps at 500 yards. Weatherby calls the double radius shoulder iconic.

Key Specifications

• The cartridge is 7mm Weatherby Magnum, a belted magnum developed from the 300 H&H case with the Weatherby double radius shoulder.
• Bullet weight is 150 grains, the load weight Weatherby lists for this part number.
• The bullet is the Swift Scirocco, and bonding the jacket to the core is how it holds together on impact.
• The G1 ballistic coefficient is .515, a measure of how well the bullet resists drag as it flies.
• Muzzle velocity is 3,225 fps from Weatherby published ballistics, which sets the flatness of the trajectory.
• Muzzle energy is 3,464 ft-lbs, the starting point for the energy the bullet delivers downrange.
• Box quantity is 20 rounds, a standard count for sighting in and a hunting trip.

Frequently Asked Questions

What bullet does this 7mm WBY Mag load use? It uses a 150-grain Swift Scirocco. The Swift Scirocco is a bonded bullet with signature black tips, built for hunting and long-range efficiency, with a progressively tapered pure copper jacket that controls expansion and is bonded to the core.

What velocity and energy does this load publish? Weatherby lists 3,225 fps and 3,464 ft-lbs at the muzzle, falling to 2,845 fps and 2,696 ft-lbs at 200 yards and 2,331 fps and 1,810 ft-lbs at 500 yards.

What is the 7mm WBY Mag cartridge? Roy Weatherby designed the 7mm Weatherby Magnum in 1944 (production began in 1947) from the 300 H&H case, a belted case that carries the double radius shoulder Weatherby is known for. Weatherby calls the double radius shoulder iconic.

Buy the Weatherby 7mm WBY Mag 150gr Swift Scirocco Rifle Ammunition, 20-Round Box

Weatherby builds this 7mm WBY Mag load around a 150-grain Swift Scirocco so the cartridge performs the way its design intends. Order it from Weatherby‘s selection of rifle ammunition through our Lubbock, Texas gun shop for fast, insured shipping.