Feel any standard crimpimg can be easily operated on same die(ie seat/crimp combined) ...it happens slightly after seating on same stroke anyway! A separate die is not needed normally ...at extra expence. The adjustment on the die and deapth-stem should be able to deal adequately with all requirements on 38Spl/357 lead it adjusted correctly.
I have been doing this for years, but cases MUST be same length for good ignition. Belling before this stage stops any "lead chaving".
Also de-priming before tumbling with media can create a problem with plugged flash-holes.Liquid is OK.
My 5c worth.Enjoy your hobby and get a reloading manual (if absent)...I didn't and it was a mistake
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Never knock another's different shooting interest or discipline...REMEMBER we are all but leaves on the same tree of freedom.