Sierra Gamechanger 7mm Rem Mag 150gr TGK Ammunition - 20 RoundsSIERRA BULLETSPrice from $39.24 to $63.27.
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Weatherby
The Weatherby 280 Ackley Improved 150-grain Sierra loaded ammunition brings a legendary cartridge design to modern shooters looking for efficient, flat-shooting performance. The 280 AI was engineered by P.O. Ackley to improve upon the standard 280 Remington by incorporating a steeper 40-degree shoulder that increases powder capacity—delivering better velocity and ballistic consistency across the board. If you're familiar with Weatherby's reputation for high-velocity, hard-hitting loads, this round upholds that tradition in one of the most respected wildcat designs ever developed.
Paired with Sierra's proven 150-grain soft-point bullet, this load strikes a practical balance for hunters working medium to longer ranges where consistent energy retention matters. The 280 AI's inherent efficiency means you're getting genuine velocity gains without the overbore penalties of magnum cartridges, making it a smart choice for shooters who reload, hunt deer and elk at distance, or simply want more performance from a standard-length action rifle. Weatherby's commitment to ballistic standards means each round is manufactured to exacting tolerances.
Whether you're developing loads for a 280 AI rifle or stocking up for the season, this ammunition represents a marriage of wildcatter innovation and modern ammunition engineering—the kind of pairing that appeals to thoughtful hunters and shooters who appreciate cartridge design and performance fundamentals.
| Cartridge | 280 Ackley Improved |
| Bullet Weight | 150 grains |
| Bullet Diameter | .284" (7.2mm / 7mm caliber) |
| Bullet Type | Sierra soft-point |
| Max Case Length | 3.34" |
| Manufacturer | Weatherby |
The 280 AI is a wildcat cartridge developed to improve the 280 Remington. It will chamber in rifles specifically built or rebarreled for 280 AI. If you own a standard 280 Remington rifle, you cannot safely fire 280 AI ammunition without a barrel rechambering by a qualified gunsmith. Always verify your rifle's chamber before purchasing any ammunition.
The 280 AI features a steeper 40-degree shoulder that increases powder capacity compared to the 280 Remington, allowing Weatherby to load this round to higher velocities and achieve superior ballistic performance while maintaining the same case length compatibility with standard-length actions.
Yes. The 150-grain Sierra soft-point bullet is designed for hunting applications, making this Weatherby load a practical choice for medium to longer-range hunting where consistent energy and accuracy are priorities.
Weatherby
The Weatherby 280 Ackley Improved 150-grain Sierra loaded ammunition brings a legendary cartridge design to modern shooters looking for efficient, flat-shooting performance. The 280 AI was engineered by P.O. Ackley to improve upon the standard 280 Remington by incorporating a steeper 40-degree shoulder that increases powder capacity—delivering better velocity and ballistic consistency across the board. If you're familiar with Weatherby's reputation for high-velocity, hard-hitting loads, this round upholds that tradition in one of the most respected wildcat designs ever developed.
Paired with Sierra's proven 150-grain soft-point bullet, this load strikes a practical balance for hunters working medium to longer ranges where consistent energy retention matters. The 280 AI's inherent efficiency means you're getting genuine velocity gains without the overbore penalties of magnum cartridges, making it a smart choice for shooters who reload, hunt deer and elk at distance, or simply want more performance from a standard-length action rifle. Weatherby's commitment to ballistic standards means each round is manufactured to exacting tolerances.
Whether you're developing loads for a 280 AI rifle or stocking up for the season, this ammunition represents a marriage of wildcatter innovation and modern ammunition engineering—the kind of pairing that appeals to thoughtful hunters and shooters who appreciate cartridge design and performance fundamentals.
| Cartridge | 280 Ackley Improved |
| Bullet Weight | 150 grains |
| Bullet Diameter | .284" (7.2mm / 7mm caliber) |
| Bullet Type | Sierra soft-point |
| Max Case Length | 3.34" |
| Manufacturer | Weatherby |
The 280 AI is a wildcat cartridge developed to improve the 280 Remington. It will chamber in rifles specifically built or rebarreled for 280 AI. If you own a standard 280 Remington rifle, you cannot safely fire 280 AI ammunition without a barrel rechambering by a qualified gunsmith. Always verify your rifle's chamber before purchasing any ammunition.
The 280 AI features a steeper 40-degree shoulder that increases powder capacity compared to the 280 Remington, allowing Weatherby to load this round to higher velocities and achieve superior ballistic performance while maintaining the same case length compatibility with standard-length actions.
Yes. The 150-grain Sierra soft-point bullet is designed for hunting applications, making this Weatherby load a practical choice for medium to longer-range hunting where consistent energy and accuracy are priorities.
