NOTES ON SEAT AND CRIMP IN ONE STEP VS. SEAT AND CRIMP IN TWO STEPS.
As the bullets is seated and moved the last smidge down to crimp, it will shave some lead on a smooth sided bullet. However, if there is a crimp groove of any size, the crimp won't shave metal from the smooth side of the bullet, but turn into the crimp groove. So comparisons of a smooth sided autopistol bullet and a revolver bullet with a crimp groove are not valid.