I just use a regular RCBS 3 die set and seat and crimp in one step. I use lead or coated bullets mostly and am able to roll the crimp into the crimping groove with no problem. The cases are fairly thin, so I do not over do it. I would probably seat and crimp in two steps is I were to start loading jacketed bullets. I do have a Lee FCD for 44/40 that works just fine but have not used it in years because the RCBS dies do just as well.