Revolver ammo,I roll crimp and I must admit that I've got a heavy hand at it,quick or slow burning powder..It always worked for me so I won't try to fix something that's not broken.
On the other hand,for s-auto guns,my taper crimp is very light;kind of like a maiden kiss.I measure the thickness of the brass X2 and add the bullet diam. and crimp to that extent.My reasoning(I might be wrong here but it has worked for me for the last few decades)is that the s-auto handgun operates through a slim powerband and I'm better keep the operating pressures as close as the blue print says(in most cases,that blueprint having come out of that great genius,Mr.Browning).