Weatherby 280 AI 150gr Sierra TGK – Superb 20 Round Box

Description

Weatherby 280 AI 150gr Sierra TGK pairs the 280 Ackley Improved with one of the better value high BC hunting bullets on the market. Muzzle velocity is 2950 fps and the G1 ballistic coefficient is 0.545, which works out to roughly 2899 ft-lbs. Twenty rounds to the box, loaded in the Weatherby Select Plus line.

• Why 280 Ackley Improved Endures
• Weatherby 280 AI 150gr Sierra TGK Specifications
• Honest Notes on the 280 AI

Why 280 Ackley Improved Endures

The 280 Ackley Improved began as a wildcat: take the 280 Remington case, blow the shoulder forward to a sharper 40-degree angle, and gain roughly 100 to 150 feet per second without asking more of the rifle. SAAMI standardized it in 2007, and it has quietly become one of the most efficient 7mm hunting rounds a bolt gun can chamber. Weatherby builds this Select Plus load around that reputation rather than around raw velocity claims.

What makes the cartridge worth owning is balance. A 150 grain 7mm bullet leaving at 2950 feet per second carries roughly 2899 foot-pounds at the muzzle and sheds it slowly, yet recoil stays in the range most shooters can manage through a full day of practice. That combination is why guides in Idaho and Wyoming keep recommending it to clients who want reach without a magnum’s punishment.

Weatherby loads this ammunition in Sheridan, Wyoming, using the same brass preparation and powder metering the company applies to its proprietary magnums. Nickel-free cases, consistent primer seating, and lot-controlled powder charges are unglamorous details, but they are the reason a box shoots to the same point of impact as the box before it.

Weatherby 280 AI 150gr Sierra TGK Specifications

The projectile is the story here. Sierra’s Tipped GameKing marries the company’s long-standing match-grade jacket concentricity to a polymer tip and a boat tail, producing a G1 ballistic coefficient of 0.545 in the 7mm 150 grain form. The tip initiates expansion at lower impact velocities than a plain soft point, which matters at 400 yards where a conventional cup-and-core bullet may simply pencil through.

Terminal behavior is deliberately moderate. The tapered jacket holds the core together through heavy shoulder bone yet still opens on a broadside lung shot, so the same load handles a whitetail at 80 yards and a mule deer across a canyon. Hunters who have gotten used to bonded bullets punching narrow wound channels tend to find the Tipped GameKing more forgiving of imperfect angles.

One honest caveat: because the 280 Ackley Improved fireforms from 280 Remington brass, first-firing velocities in a fresh chamber can run slightly below the published figure. That is normal, not a defect, and it resolves once the case takes the improved shoulder.

• Cartridge: 280 Ackley Improved
• Bullet weight: 150 grain
• Bullet type: Sierra Tipped GameKing, polymer tip, boat tail
• Muzzle velocity: 2950 feet per second
• G1 ballistic coefficient: 0.545
• Muzzle energy: approximately 2899 foot-pounds
• Case: brass, boxer primed, reloadable
• Quantity: 20 rounds per box
• Series: Weatherby Select Plus
• UPC: 747115454587

Honest Notes on the 280 AI

Buy this if you already own a 280 Ackley Improved rifle and want a factory load that behaves like a carefully worked-up handload. The Weatherby 280 AI 150gr Sierra TGK is built for hunters who shoot past 300 yards on purpose and want a bullet that still expands when it gets there.

Skip it if your rifle is chambered in standard 280 Remington. Improved cases will not chamber, and forcing the issue is a good way to ruin an afternoon. Skip it also if you are looking for the cheapest range fodder, because Select Plus pricing reflects component cost rather than volume.

Reloaders should note that fired cases from this ammunition come out already fireformed to the improved profile, which makes a box of Weatherby 280 AI 150gr Sierra TGK a reasonable way to build brass stock while hunting.

Shooting a different Weatherby chambering? Compare this load against the Weatherby 270 WBY Mag 134gr Hammer Custom for a lighter monolithic option, or the Weatherby 25 WBY RPM 117gr Barnes LRX if you want a flatter-shooting quarter bore. For deeper background on bullet construction, Sierra publishes its Tipped GameKing design notes directly.

MAG5 Firearms stocks Weatherby Select Plus ammunition alongside the rifles that shoot it. Questions about which 7mm load your barrel prefers, or whether your chamber is standard or improved, are welcome before you order.