Modifying a parent case's dimensions has a big effect on a cartridge's velocity, energy and power. Find out exactly how.
The .219 Zipper persisted fitfully from 1938 to 1962 in that purgatory reserved for cartridges that look good on paper but somehow never quite measure up in real life. At this late date, it’s difficult to determine exactly how the .219 Zipper ended up on the compost heap of shooting history.
P.O. Ackley gave the world — both wildcatters and average shooters alike — a 7mm to love: the .280 Ackley Improved. And all these years later it’s still one of the most versatile big game hunting cartridges ever conceived.