I've got the same rifle as you and I'm on my last box of 162 amaxs which shoot 1/4 on a bad day.
Interested in what your load data is, powder/length to ogive etc
I am charging 71gr H1000 and cci mag primer. I have not ran it over my Chrono yet. I should be .020" off the grooves but can't remember the length(not home right now).
Same charge with 160gr TMK gets me 2990fps
What load are you running and speed with your Amax?
Thanks
James