I have both FFP and SFP scopes,and really prefer SFP. While ranging on a FFP scope is easier,you can range with a SFP at more than one magnification.
Ranging on a SFP 6-24x scope can be done at 6x-12x-18x-or 24x if you know how to do math.
In today's High Tech world,I don't even worry about it. I just tape ballistic data to my stock,and use my range finder.
Range it,Crank on the turret's,Pull the trigger. It's a pretty simple concept!