I have been reloading for a while but just got a 1911A1 that I want to start reloading for. I am used to reloading for rifles. I got some Hornady 45ACP/AR/ WIN dies the Custom Grade New Dimension. This is a 3 die set. Seems pretty straight forward. However there are two seating stems included in the box one is a familliar conular (tapered) type for seating pointy (For lack of a better term) type bullets, and a Flat type seating stem, what is that used for? Is it for seating wadcutters or something to that affect? I have read the manual forwards and backwards and cant find a mention of it.