|Current Rifle Cartridges
|.280 Ackley Improved or .280 Remington Improved
|The first version of this cartridge was invented by P.O. Ackley (a famous wildcatter of over 27 different wildcats) by necking
down the 30-06 Springfield case to 7mm and fire forming them to a 40 degree shoulder angle and calling it the 7mm-06 Wildcat.
After Remington standardized the 280 Remington, Fred Huntington ( another well known wildcatter) tried several should angles
to improve it and the 30 degree angle was the most popular, then Ackley dropped the fire forming of the 30-06 and changed to
the 280 Remington case necked to 7mm with a 40 degree angle for more powder. Long story short, the Ackley design stood the
test of time and now is a standardized SAAMI cartridge and technically no longer a wildcat.
|Please note, picture to
left, the two cartridges
to show you difference
in shoulder neck angle.
Left : 280 Ackley
Improved with a 40
Right: 280 Remington
with a 17 degree & 30