Here are my results of first reloads using the 338 230 gr Frankenstein bullet
used 4350 powder
from bench at 50 yds.
my mold is the hollow point, so the bullets are more 225 gr in weight.
first pic shows
50 yds
red circle - 4 shots with surplus 8x56r rounds. Only 4 shots show, because first shot is off the paper. I then adjusted aim point to the very bottom of paper, so at 50 yds was shooting ahout 11 inches high and to the right.
Low green circle - 41 gr 4350 powder
aim at same point, bottom of the paper.