I don't think that's the case. The PTX goes in the powder measure case activated powder drop. You can expand and drop powder at the same time with it.
I would recommend using powderfunnels.com's universal PTX, and getting a single powder through expansion linkage per caliber - that way you can set one linkage per caliber for expansion with the powderfunnel.com universal PTX, and not have to adjust every time you change caliber.
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