Texas, Trail Boss seems to work for cast bullet loads on most rifle calibers. The formula is to mark a case where the base of the bullet lies. Weigh the amount of Trail Boss it takes to reach that line in the case and then start with 70% of that weight. Your max weight is the volume that is just below the point that would cause any compression of the powder. It may not regulate but it will give you a way to shoot some inexpensive loads.

Thank you for the info.
I did it w/ my 416 Taylor. The bullet maker recommended I load a
Case full of H4831.
I opted for an approach similar to yours. It worked well.
H4831 in the 9.3 x 74R ?