Weatherby .257 Wby Mag 100 gr Scirocco Ammunition 20/Box

Weatherby .257 Wby Mag 100 gr Swift Scirocco Ammunition

This Weatherby load uses a 100 gr Swift Scirocco projectile featuring a bonded core and progressively tapered pure copper jacket. Swift's signature black polymer tip and secant-ogive profile contribute to its high ballistic coefficient and flat trajectory, while the bonded construction is designed to control expansion across a broad range of impact velocities. Weatherby lists a bullet diameter of .257" and a G1 ballistic coefficient of .429. Factory ballistic data specifies a muzzle velocity of 3575 fps and muzzle energy of 2838 ft-lb, making this configuration well suited to demanding hunting applications where velocity, trajectory and controlled terminal performance are important.

Key Features

- 100 gr Swift Scirocco projectile
- Bonded core and jacket construction
- Progressively tapered pure copper jacket
- Black polymer tip
- Secant-ogive profile for efficient downrange performance
- Designed for controlled expansion across a broad velocity range

Technical Data

- Brand: Weatherby
- Caliber: .257 Weatherby Magnum
- Bullet weight: 100 gr
- Bullet: Swift Scirocco
- Bullet diameter: .257 in (6.35 mm)
- Ballistic coefficient G1: .429
- Muzzle velocity: 3575 fps
- Muzzle energy: 2838 ft-lb
- Maximum case length: 2.549 in
- Quantity: 20 rounds

Why Buy This Product

This Weatherby load combines .257 Weatherby Magnum velocity with a premium 100 gr Swift Scirocco bonded projectile designed for controlled expansion, flat trajectory and efficient hunting performance downrange.