Federal Premium, 280 Ackley Improved, 155 Grain, Terminal Ascent, 20 Round Box P280AITA1
Specifications:

Caliber	280 Ackley Improved
Bullet Type	Terminal Ascent
Bullet Weight	155 gr
Muzzle Energy	2954 ft lbs
Muzzle Velocity	2930 fps
Rounds Per Box	20
Boxes Per Case	10
Application	Hunting
Casing Material	Nickel-Plated Brass