Hi,
Back thru the end of the '80s I used 452 for all my 12 ga trap loads, and 473 for 20 ga skeet and field loads. I wasn't loading metallic cartridges at the time. If memory serves, 452 was replaced by WST and 473 was replaced by WSF.
I'm not advocating any "Well it looks kinda like this one on the chart" substitutions, but you might want to see what those two "newer" powders are used for besides shotshells. One thing that bothered me about Winchester back then was their continual changes, in powder names if not formulations. While they weren't the powders used in factory ammo, there were notations in the books that "this load duplicates the factory AA-whatever ballistics." Dunno if WST and WSF loads carry that same notation, as I went back to Alliant, with Red Dot and Unique still my most used standbys.
Rick C