Charging die for indexing

Using an indexing press, I want to use 1 of the stations for adding powder. I'll measure it separately and pour it manually. What kind of die would work? This is for .243 bottle-neck casing.

I looked into the Lee charging die but it says that it's for use with one of their powder measures, wondering I cannot pour it myself. Wondering if I add a funnel on top of this die instead of a Lee powder measure, will that work or the powder will go all over and out the case. Cannot find the mechanism of how this works.