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The 280 Ackley Improved has long been a favorite of hunters who want 7mm Magnum performance without the extra recoil, and Weatherby's take on it lives up to the pedigree. This Select Plus load drives a 150-grain Sierra Tipped GameKing bullet out of the muzzle at roughly 2,950 fps, with a trajectory flat enough to make holdovers a non-issue at normal hunting distances. The cartridge itself traces back to P.O. Ackley, a wildcatter cut from the same cloth as Roy Weatherby, who steepened the shoulder of the .280 Remington to 40 degrees and boosted powder capacity for a real jump in velocity.
Sierra took its legendary MatchKing target bullet and re-engineered it into a hunting projectile, and the result is tough to beat. A green polymer tip seated over an open hollow point pocket kicks off instant expansion on impact, while the tuned ogive and boat tail design deliver a high ballistic coefficient and the kind of accuracy Sierra built its name on. Underneath, a special lead alloy core wrapped in a thick, tough copper jacket controls expansion and holds weight together so you get deep, reliable penetration at a range of distances.
With a .545 G1 ballistic coefficient and nearly 2,900 ft-lbs of muzzle energy, this is a genuine do-it-all big game round. It is right at home on whitetail and mule deer, hogs, pronghorn, and larger game out to extended ranges. The flat trajectory and retained energy mean you can hold on and trust it when a shot opens up a little farther than you planned.
Weatherby built its reputation on speed and clean kills, and this factory load keeps that tradition going. The brass is reloadable too, which is a nice bonus for anyone who likes to work up their own recipes down the line.
This load is a strong all-around big game choice, well suited to whitetail and mule deer, pronghorn, and hogs. With nearly 2,900 ft-lbs of muzzle energy and a high-BC bullet, it also handles larger game out to extended ranges. The Sierra Tipped GameKing is built to expand reliably across a wide velocity window, which makes it versatile from close cover to longer open-country shots.
Weatherby lists this load at a muzzle velocity of about 2,950 fps. It stays supersonic and carries meaningful energy well past 500 yards, holding roughly 2,148 fps and over 1,500 ft-lbs at that distance. That translates to a flat trajectory and plenty of authority for ethical shots at real-world hunting ranges.
Yes, the cases are reloadable, which is a nice perk for handloaders who want to tune their own recipes. The 280 AI is a popular wildcat-turned-standard cartridge among reloaders, and Weatherby brass gives you a solid foundation to start from. Just inspect and prep your fired cases as you normally would before working up a load.
The Tipped GameKing, also sold as the GameChanger, takes Sierra's proven GameKing hunting bullet and adds a green polymer tip over an open hollow point pocket. That tip boosts the ballistic coefficient for a flatter flight and kicks off faster, more consistent expansion on impact. You essentially get MatchKing-style accuracy paired with dependable terminal performance on game.
| UPC | 747115454587 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | S280A150TGK |
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