Description

Hornady American Whitetail 300 Win Mag 150gr InterLock SP — 360 Rounds

The Hornady American Whitetail 300 Win Mag is Hornady’s volume deer hunting load in .300 Winchester Magnum — 150-grain InterLock Spire Point at 3,275 fps, with a G1 BC of 0.552 and 3,572 ft-lbs at the muzzle.

At $1.39 per round for 360 rounds, the Hornady American Whitetail 300 Win Mag is the practical choice — Hornady quality at a price that allows pre-season load development without rationing rounds.

The InterLock Bullet — A Specific Design for a Specific Problem

Many jacketed soft point bullets suffer from core-jacket separation on impact. The lead core exits separately from the copper jacket, which reduces the effective wound channel and limits penetration.

Hornady’s InterLock design addresses this directly.

A raised ring is machined into the inside of the jacket at a specific point. That ring embeds into the lead core during assembly — mechanically locking core and jacket together.

Under impact, the InterLock ring in the Hornady American Whitetail 300 Win Mag keeps core and jacket together through expansion and penetration. Retained mass stays in the target and continues to penetrate, rather than separating and dissipating energy.

The InterLock is a mechanical bond, not a chemical one.

It is less aggressive than AccuBond or Terminal Ascent bonding, but more reliable than an unbonded JSP at the impact velocities .300 Win Mag produces.

Full Ballistic Data

• Muzzle velocity: 3,275 fps
• Muzzle energy: 3,572 ft-lbs
• G1 ballistic coefficient: 0.552
• Sectional density: 0.226

G1 BC of 0.552 is solid for a 150-grain .30-calibre hunting bullet.

The high muzzle velocity (3,275 fps) leverages that BC — the Hornady American Whitetail 300 Win Mag retains velocity and energy effectively at typical deer hunting distances.

Sectional density of 0.226 supports adequate penetration for deer, including quartering shots.

Semi-Auto Compatible

Hornady loads American Whitetail to conventional velocities and matches powder to each load for consistent pressure.

The result is compatibility with semi-automatic rifles chambered in .300 Win Mag — not all hunting loads are. Confirm function in your specific platform.

Specifications

• Caliber: .300 Winchester Magnum
• Bullet: 150 grain, InterLock Spire Point (SP)
• Muzzle velocity: 3,275 fps
• Muzzle energy: 3,572 ft-lbs
• G1 BC: 0.552
• Sectional density: 0.226
• Application: Deer, medium game, large game
• Lead free: No
• Cartridge case: Brass, reloadable
• Primer: Centerfire
• Quantity: 360 rounds (18 × 20-round boxes)

Where It Fits in the .300 Win Mag Range

Two .300 Win Mag loads are now in this category:

• Barnes VOR-TX 180gr TTSX BT — lead-free, solid copper, $2.86/round, 140 rounds
• Hornady American Whitetail 150gr InterLock — conventional lead-core, $1.39/round, 360 rounds

Choose the Barnes for California and lead-restriction states, or for heavy-bone large game.

Choose the Hornady American Whitetail 300 Win Mag for volume deer hunting at practical prices — Hornady quality without premium pricing.

Browse the .300 Win Mag ammunition category. Technical specifications are published by SAAMI and by Hornady directly. Safe storage guidance is available from the NSSF.

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SHORT DESCRIPTION (above Add to Cart)

Hornady American Whitetail .300 Winchester Magnum. 150-grain InterLock SP — exposed lead tip, secant ogive, InterLock ring for controlled expansion. 3,275 fps, 3,572 ft-lbs, G1 BC 0.552, SD 0.226. Semi-auto compatible. Brass case, reloadable. 360 rounds (18 × 20-round boxes). Not lead-free. Deer and medium game hunting load.

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💬 Before You Go — Deer Hunting With American Whitetail in .300 Win Mag?

Using this load on whitetail or mule deer? Leave a review with the range and the result — and tell us whether you run it in a bolt or a semi-auto, because that’s useful context for the next buyer. And if you came looking for a load we don’t carry in .300 Win Mag, tell us what it was. 🎯

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Please purchase and use ammunition responsibly and in accordance with all federal, state and local laws. Ammunition cannot be shipped to all jurisdictions — verify legal shipment to your address before ordering. Buyers must be of legal age in their jurisdiction. Not for sale to prohibited persons.

Frequently Asked Questions

What is the InterLock ring? A raised ring machined into the inside of the bullet jacket that embeds into the lead core during assembly. Under impact, it mechanically prevents core-jacket separation, maintaining weight and continued penetration.

Is it bonded? Mechanically bonded via the InterLock ring — not chemically bonded like AccuBond or Fusion. Adequate for deer at typical velocities; for elk through heavy bone, a chemically bonded or solid copper load is more appropriate.

Is this lead-free? No — lead-core InterLock bullet. Not California-compliant for hunting.

Is it semi-auto compatible? Yes — Hornady loads American Whitetail to conventional velocities with pressure-matched powder for consistent semi-auto function. Confirm reliability in your specific platform before hunting season.

What’s the sectional density? 0.226 — the ratio of bullet mass to frontal area. Adequate for deer; higher SD means deeper penetration for a given bullet diameter.

What’s the muzzle energy? 3,572 ft-lbs — more than enough for deer at any reasonable hunting distance.

Can I reload the brass? Yes — standard Hornady brass, Boxer-primed.

What’s the per-round cost? $500 / 360 = $1.39 per round.