In my Knights I shoot Bullshop .504 400gn bullets, In my Whites (U-Mag & Whitetail) I use Bullshop .5045 460gn and 400gn. The difference if I remember corectly is the .5045 are only ran thru the sizer once , where the .504 have been an thru the sizer twice. Powder loads very from 70 to 110 gns of t-7ff and no wad to using a fiber wad on top of the powder.
Patience and practice equals a proven load.