SO i got a dillon 650 and about to start reloading 40SW. I have the dillon die and i hear that the resizing die does not resize the case all the way down to the head. This is a issue mostly with once-fired brass from a glock with a factory barrel, bc of the pressures in the barrel it cause the case to expand alot.

So my question is, which resizing die does resize all the way down, should i just change my barrel to an upgraded after-market version?

Note: Before ppl ask, Yes this is the first time reloading, and i hear that i shouldn't start with a dillon, but i am a firm believer of "buy once, cry once" so i wanted the best. Also i do have reloading books and resources, so even though this is my first time, i'm no idiot. I do my research.