I'm kinda a "group hug" handloader instead of a "speed freak"; not that I oppose a group that does have some gallop.
Don't own a chronograph (yet), but got the chance to clock some 9pm handloads through a freind's gizmo about a month ago. Discovered:
The walk-in-park loads, that I was sure were below IDPA power factor, were in fact - below power factor.
The loads I thought to make power factor, did so.
The Urah, chest thumping, full bore, manly man loads were arriving on target in less time - like in about 250 fps less time than the midrange loads.
A lack of planning on your part does not necessarily constitute an emergency on my part.