start at 74.5 and go in .3 increments, at 75.8-76.3 should be a sweet spot, but i would go to 77.2 to be sure your not leaving nothingSorry. 73.5-76.8. H1000 and 208 Amax in my 110BA.
on the table, you may see a node aprox-every 1.2-.4 grains.
after you find your powder node work your seating depth.be safe and keep a close eye on psi.
a 200 yard ladder test will show you that you wasted your time at 200, a ladder test under 500 yds with a 300wm is a waste of components and time.