WST 1 is plain old WST or Winchester Super Target, the 1 just means it was a 1 lb container, I have a 3 lb can on the shelf that is WST3. WST is suitable for 1 or 1 1/8 oz 12 gauge loads, also works well for 9mm and 38 special loads
Load data for Hodgdon HS-7 is the same as 571, they are the same powder made at the same plant. Hodgdon even posted that information at one time. 571 is great for 1 1/4 oz 12 gauge loads and for 1 oz 20 gauge loads. Hodgdon has data on there site.
785 is a magnum rifle powder
Bluedot said nothing to argue with! just find some older shotshell reloaidng manuals if not data for WW571 / Hodgdon HS-7. And like someone else said WW473 was a 20 gauge powder for 7/8oz loads.
