I'm using 73.0 Retumbo in my 7mag with the 168 VLD. 24" Shilen Select Grade #4 on a blueprinted 700.
This rifle is the only one that I have that has had 4 different loads shoot one hole groups at 100 yards. This is using a rock solid bag rest on concrete bench tables. Trigger is set at 1 pound.
The VLDs are .001 off the lands (no more than .003). When I did the ladder test, starting at 68.0 grains, the cluster was no larger than 5/8". I knew then that the powder/bullet combo was going to shoot well.