6.5-300 Wby Mag Weatherby 140gr Hornady Interlock 3275 fps 20rdsWeatherby Select 6. 5 300 Weatherby Magnum 140gr Hornady InterLock at 3,275 FPS. One of the fastest 6. 5mm factory loads available the InterLock ring keeps core and jacket together for controlled expansion and deep penetration on elk, mule deer, and antelope at extreme range. Norma brass, non corrosive Boxer primer. 20 rounds per box. Caliber: 6. 5 300 Wby Mag Bullet: 140gr Hornady InterLock Velocity: 3,275 FPS 20 rounds InterLock ring, controlled