I am about done running the "American" powders and will run VV. Cleaner & better powder for the same or less $ these days.
I have several old Speer manuals, including no. 8. Keep in mind when that was published in the early 70s, pressure testing was not near as advanced as today. There was not piezo electric transducers, a lot of the data was done by inspection, i.e., we have to beat the cases out with a rod and mallet, we've hit max.
If you find a copy of the A Square manual, it has pressures listed. It is a very informative manual if you like data. It is out of print, if you track one down, it will be $150-200.