Hornady American Whitetail 300 Winchester Magnum Ammo 150 Grain Hornady Interlock Jacketed Soft Point Box of 20

Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.

Hornady American Whitetail 300 Winchester Magnum ammo in 150 grain loads the legendary Interlock jacketed soft point — a controlled-expansion hunting bullet designed for the whitetail hunter who demands consistent accuracy and terminal performance. This 300 Winchester Magnum ammunition produces 3275 feet per second muzzle velocity and 3572 foot-pounds of energy from a 24-inch test barrel, giving you flat trajectory and hard-hitting energy at distances where conventional rifle cartridges start to lose authority. Hornady manufactures this load with modern components, boxer-primed brass cases, and non-corrosive primers — all reloadable for shooters who roll their own. Each box contains 20 rounds of new-production ammunition made in the United States.

Built for the Box

The Interlock design features a mechanical jacket-to-core lock ring that prevents core-jacket separation during expansion. When the 150-grain JSP impacts soft tissue, the tapered jacket and hard-alloyed lead core remain locked together, retaining mass and transferring energy into the target. This controlled expansion produces wound channels that drop game quickly while maintaining enough structural integrity to reach vitals on quartering shots. Hornady has built the American Whitetail line around this bullet because it delivers the stopping power serious hunters expect — without the premium price of bonded or monolithic designs.

Specs at a Glance

This ammunition ships as a DOT-regulated product and is subject to applicable shipping restrictions. Browse our full selection of 300 Win Mag ammo for additional bullet weights and manufacturers.