Getting to 0 lash 273 rockers hydraulic cam

Wanting to adjust valves on 340 with 273 rockers
on hydraulic lifters. Have read on other threads to get
the cam on the lowest point for selected
rocker ( that part is easy enough for me )
then rotate pushrod with fingers while tightening
adjuster until pushrod becomes a little stiff to turn. I now have 0 lash? This is where I need to make sure that this is correct.
Then I'm guessing that the adjusters (273 stock)
are either 16 or 18 threads per inch so to achieve .030
of preload I would tighten the adjuster another 1/2 turn?
Does all this sound correct or am I missing something?