.22-250 ackley improved information.


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Bluenote
May 28, 2010, 10:16 AM
Seeking input on the .22-250 ackley improved in comparison to .22-250 and .220 swift.

Ran across a very good deal on one built on a Mauser action , 24 inch barrel but am hesitant to jump on it without some input from folks with direct experience with the caliber. On paper it looks to be a significant improvement over the .22-250 ( which I have extensive experience with) and a good alternative to building a .19 or .20.

Any input would be welcome.

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NCsmitty
May 28, 2010, 09:13 PM
I'm guessing that you'll get anywhere between 100-200fps advantage with the AI over the standard, along with better case life if it's loaded sanely. A little quicker throat erosion goes along with the higher velocities.
Look it over, especially the barrel throat for throat wear/erosion, and if it looks good, it should be a fun gun.



NCsmitty

Kernel
May 28, 2010, 11:05 PM
It’s likely the AI cartridge will prefer a slightly slower powder. Conventional wisdom (and thermodynamic theories) says when everything else stays the same, and powder volume increases, the ideal powder speed shifts slower. Bottom line, what ever your favorite powder is now in your current regular .22-250 might not prove out to give top velocities in the improved AI form. Just something to watch out for as you develop new loads.

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