Quote Originally Posted by South Prairie jim View Post
What would be the advantage to a Ackley improved 22-250 ?
I don’t get it… but I am curious.
The Ackley gives you more case capacity for more velocity. For example, in a standard 22-250 Rem you can typically push a 52/53gr bullet to around 3700fps or so. In a 22-250 Ackley Improved you can push the same bullet to 4000fps. While the extra speed isn't really needed for the traditional bullet weights (40-65gr) for this caliber, it comes in real handy with the heavy for caliber bullets (75gr and up) for long-range shooting.

This particular rifle, loaded with an 80gr Nosler Custom Competition bullet and a healthy charge of H-4350 is driving said bullet to just over 3300fps. Zeroed at 200 yards, that equates to just a fudge over 22 minutes of drop at 1,000 yards (real world data). A 6.5 Creedmoor shooting a 147gr ELD-Match bullet at 2700fps would need just short of 28 minutes to go from a 200yd zero to 1k (based on Hornady's 4DOF ballistic calculator). Of course the 6.5mm bullet will offer less wind drift than the .22 caliber, but it's less than a minute difference at 1k.