I’m sure a FCD die is the best way to got but I get a solid crimp, correct seat depth and very good accuracy with a 45 LC Lee 3 die set, seating and crimping on the same stroke. You will waste a few bullets setting the dies up but compared to going through the process of resetting the seat stem and crimp depth every time you load a batch, it’s a no brainer, to me anyway. The Lee instructions give the procedure but you’ve got to go through the adjustment process and figure on pulling a few bullets before you get it right.
If you’re like me 99% of your reloads are for target shooting and/or plinking and use the same bullet and COL. So my dies get set one time, period. I’ll load 500 round at a sitting and get consistent length and crimp batch to batch. I have four turrets for my one press, each turret holds 6 dies so each turret loads two different cartridges. Once they’re set the dies never get adjusted. For me an inconsistent crimp can only occur if the length of my brass is inconsistent. By sticking to one head stamp of brass that doesn’t happen. If case lengths vary a mill or two seating depth stays the same but your crimp will change because a short case won’t go into the crimp die as far. Set & forget is my motto unless I change bullets.