SnakeEater,
According to the Lyman 48th Edition Reloading Handbook:
75 grain A-Max is listed at 2.390" AOL.
Varget 23.0 grns starting with 2606 fps.
Max load is 25.6 grns at 2,843 fps.
They also list a 77 grn JHPBT at 2.260" OAL
Varget 22.5 at 2591 fps to25.0+ (indicates a compressed charge) at 2,788 fps.
The 77 grain is a Sierra, The A-Max obviously is a Hornady.
Hope this helps,
Hold hard
Jim