Berger manual says 69.0 to 72.8.
Seems kind of low to me on the top-end, considering I push 180's with over 71gr of 7828 SSC...
I'd start at 70 and see how high you can work up before you start getting pressur signs (flattened primers and sticky bolt, etc...).
My STW doesn't like H1000. It shoots great sometimes, then other times those same loads will shoot like crap. It's weird. Which is why I quit using H1000.