Hornady InterLock Bullets 303 Caliber and 7.7mm Japanese (312 Diameter) 150 Grain Spire Point (100pk) Type_30 Cal It is considered too light

It is considered too light for the 378 Weatherby Magnum unless held to lower velocities

Bullet Weight: 100 Grains

Tested out to 600 yards by AAC

This is a lead core copper jacketed hollow point bullet with exposed lead nose

Hornady InterLock Bullets 303 Caliber and 7.7mm Japanese (312 Diameter) 150 Grain Spire Point (100pk) Type_30 Cal It is considered too lightThe InterLock is designed to be a devastating hunting bullet and nothing less. The InterLock Ring a Hornady exclusive ensures that the core and jacket remain locked during expansion. The InterLock retains more mass, energy and momentum after impact and transfers that energy to the target. Its reliable stopping power has earned the InterLock a worldwide reputation as a bullet for serious hunters. This is not loaded ammunition. Ballistics Information