Thread: P O Ackley

That correct Sidney, Remington chambered it in there lever and semi autos trying to find something to compete with the 270 winchester.Pressures where lowish. They try ed renaming it in the late 70s "7mm express" and quoted higher velocities but it didn't take off and created a bit of confusion so they went back to calling it .280 rem. As to the gains with the ackley improved unless your properly set up with pressure testing gear and worked up in 280 then re chambered to AI in the same barrel its just guess work but the gains are there along with a few other benefits.