I use WW231 for my .45ACP loads with my Dillon, and I've never had any problems with the powder measure. I also recommend getting the new powder measure linkage from Dillon for older presses. it has a positive interlock to avoid the possibility of a double charge, and it's only $10 for the upgrade kit. Their new presses started coming with this linkage sometime in 1998, but both of my powder measures were considerably older than that, so I picked up the update kits.
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