I have the first edition of the Lyman Handbook of Cast Bullets. It doesn't have anything as modern as the 338 W.
However, loading cast bullets in strong rifle actions, you are thinking in terms of accuracy and not dangerous pressures. If you can get your cast bullet up to a bit over 2000 fps, with good accuracy, you are doing great. oh, I know, some reloaders get them going faster, but it is tricky. So, when you are working up your load, going from good groups, then suddenly a couple more grains of powder gives really bad flyers, you have reached your limit. Actually, gone past your limit. I have caught some of these flyers in snow and discovered a rut down the side of the bullet, about the size of a wooden kitchen match, where the bullet hasn't held the pressure and it escaped past the bullet. This was with gas check bullets, hard cast, in a 30-06.
Thus it is very easy to work up loads with cast bullets. They use powder that is faster burning than what would likely be used with full power jacketed bullets.
