I agree with others about safety/accuracy trumping speed. With that being said, if it took me 2 minutes a round to load 9mm it wouldn't be worth my time. Time does count for something.
For pistol my case prep is throwing them in the tumbler to clean, then taking them out and shaking all media out. I then load In a Lee Classic Turret. I do ALWAYS check powder in the case before seating a bullet (learned my lesson there many years ago), and i'm usually not in the mood to maintain a factory production pace. Even then, about 130-150 rounds an hour or so is achievable without trying to "go fast."
I also cast and powder coat, so technically I should count that time as well. For casting I'll set aside a couple of days in mid winter (right about now actually) and cast everything I think I'll need for the next year. Usually a couple thousand of 9mm, 1k or so of .45, about 500 of .38/.357 (these days I need to up that I shoot much more and had to recast a couple of times last year), and a few hundred each .44 and .36 lead balls for black powder. I don't cast rifle bullets (boollits) but I want to start for .303 brit and some .309 projectiles thrown in.
For .223 I have loose tolerance. A lot of my .223 shooting is gunfighter training (I'm a cop and LE firearms instructor) at 50 in. No crazy 1/3rd moa accuracy needed. I do want my ammo to be capable of 1" groups at 100 though, so I do spend enough time to easily be more accurate than the overwhelming vast majority of factory ammo. I don't always trim, though I do always confirm that the case is under SAAMI max length.
For any bolt rifle, even my WW2 milsurp collection with original iron sights, i go whole hog. Cases are weighed and sorted, trimmed to the same length, I check for runout, measure powder +/- .1 grain, everything. Ironically, the chambers and throats are so generous in the vast majority of my bolt rifles that it is quite likely my excess care in reloading is time wasted. But it makes me feel good... and part of that time is to size the case to the particular rifle chamber (at least length wise).