I'll have test results in about a week for WST and WSF in reduced loads for 30wcf and 7.7x58 Arisaka. Thus... along with the 30-06 results I posted earlier in this thread, there will be a little more data for the semi-fast and medium burn rates for shotgun powder.
I picked WST/WSF due to it's recent common availability, lower price, and burn rate relative to other more used/published reduced load powders.
WST burn rate tracks around trailboss/H international/green dot
WSF burn rate tracks a bit slower than unique/universal/herco
On paper WSF is the bulkier of the two by weight/volume. This is per the Lee VMD (volume measure density) chart. I use it as a rough estimate of how much a powder will take up volume wise in a case. This is when quickload is unable to provide me an estimate.