The 3/8x24 threads per inch adjusters move the tip in or out .041666, which I round up to .042, per one full turn of the adjusters so doing the math on the lifter side of the rocker arms make the lifter plunger see the same amount of change, correct 1 divided by 24 =.041666
If your using 7/16 x 20 adjusters each full turn equals .050 looser or tighter per each full turn of the adjuster.
I use between 1/4 to 1/2 turn preload on both the 3/8 and 7/16 adjusters, maybe a tiny bit more on aluminum heads, 1/3 to 1/2 turn on 3/8 and 2/3 to 3/4 turn on the 7/16 adjusters at room temps and then reset them warmed up
I am not a big fan of any of the after market .903 or .904 hydraulic roller lifters that I have used yet
Hopefully soon, in the near future
In the meantime I'll stick with a good set of solid roller lifters