I realize this is an ancient thread, but I have stumbled across something interesting. I purchased 200 rounds of 123gr scenar directly from AA, and a box of 123gr A-max from a local gun shop. The AA ammo uses Hornady brass (as does the A-max of course). After once-firing on both (did not measure before), the AA is between 1.526-1.531, yet the A-max is 1.516-1.520. Is it possible this is due to higher pressure in the AA loads, or could it be that Hornady trims more on their factory fodder?
[UPDATE] The Lee hand trimmer is set up for 1.516. I am hoping that the .006 tolerance Bill A. mentioned is still valid for their current (4th edition) minimum of 1.520.
[UPDATE 2] A a minor side note, the longer AA brass makes using the Lee hand trimmer wear out your hand after about 40 rounds (for me anyway).
[UPDATE] The Lee hand trimmer is set up for 1.516. I am hoping that the .006 tolerance Bill A. mentioned is still valid for their current (4th edition) minimum of 1.520.
[UPDATE 2] A a minor side note, the longer AA brass makes using the Lee hand trimmer wear out your hand after about 40 rounds (for me anyway).