228 Ackley Magnum
Historical Notes:
The 228 Ackley Magnum dates back to about 1938 and, although it has been around
a number of years, it developed only a limited popularity. Like the 22
Newton, it was designed as a combination varmint and big game cartridge
Ammunition is made by necking down and shortening 30-06
Springfield or 308
Winchester brass. There are several versions of this cartridge, but the
Ackley design is the most popular.
General Comments:
Rifles in 228 caliber using heavy jacketed bullets designed for big game have
been used very successfully all over the world. Bullets of this type were made
in weights from 70 to over 100 grains by Fred Barnes, but are now difficult to
obtain. Rifles in this class have proven rather conclusively that the difficulty
encountered with the 220
Swift and other high velocity 22's has been mostly a matter of improper
bullet design. Factory 22 caliber centerfire loads are all made for varmint
shooting and don't hold together or penetrate deeply enough on big game.
Sometimes they do and the result is spectacular, but mostly they blow up on
contact and inflict a horrible, but not immediately fatal wound. As a result,
hunting deer and antelope with any 22 caliber centerfire rifle is illegal in
most states. I have witnessed some instant one shot kills on deer and antelope
with high velocity 22 rifles using proper bullets for the job. Bear this matter
of bullet construction in mind next time you get into an argument over the
effectiveness of small caliber rifles on big game.
Source: Cartridges of the World
| 228 Ackley Magnum Reloading Data | ||||
|---|---|---|---|---|
| Bullet (grs.) | Powder / (grs.) | MV | ME | Source |
| 70 SP | IMR 4350 / 46.0 | 3650 | 2070 | P.O. Ackley |
| 90 SP | IMR 4350 / 43.0 | 3480 | 2420 | P.O. Ackley |
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