How tight to set solid lifters

For what it's worth,
I'm building a bbc with a Howard's Solid Roller and I called them today about setting the lash for initial start up
The Hot setting is .022 for both valves
He said to set them .018 cold
Then check again when Hot, the lash will grow about .004 when Hot on a iron block with aluminum heads.
Straight from Howard's Cams...