Weatherby (part no. S280A150TGK) loads this .280 Ackley Improved round with a 150-grain Sierra Tipped GameKing bullet, chambering a cartridge P.O. Ackley originally developed by steepening the .280 Remington’s shoulder to 40 degrees to squeeze in more powder capacity. Weatherby is known for pushing ballistics and velocity, and its .280 Ackley Improved loadings are built to push industry-standard performance for the 7mm-caliber cartridge, using a bullet diameter of .284 inches. It’s a serious big-game hunting round for shooters running a rifle chambered in this wildcat-turned-standardized cartridge. In ammunition built around genuine rifle ballistics, this is a purpose-matched hunting load.

Key Specifications

• The chambering is .280 Ackley Improved, a rifle cartridge, not a handgun round.
• The bullet weighs 150 grains.
• The bullet is a Sierra Tipped GameKing.
• The cartridge uses a 40-degree steepened shoulder, increasing powder capacity over the standard .280 Remington.
• The cartridge was originally developed by P.O. Ackley as a wildcat improvement of .280 Remington.
• The bullet diameter is .284 inches (7.2mm), the standard 7mm-caliber bore.

Frequently Asked Questions

Is this a rifle or handgun cartridge? It’s a rifle cartridge. .280 Ackley Improved is loaded for bolt-action rifles, not handguns, despite how this listing is filed on the site.

What is a ‘steepened shoulder’ and why does it matter? P.O. Ackley reshaped the .280 Remington’s shoulder to 40 degrees, which increases powder capacity and typically adds velocity over the parent cartridge.

Buy Weatherby .280 Ackley Improved 150gr TGK Ammo

A wildcat-turned-standard cartridge built for more powder capacity and velocity deserves a proven hunting bullet, and Sierra’s Tipped GameKing delivers that. Order from our Lubbock, Texas gun shop and it ships fast to your door.