If it's a range day, and I'm wanting to get the most out of shooting 50, 75, maybe 100 rounds out of a handgun, I find investing a bit of time on the rifle line first gets me into that "groove" best.
For whatever reason, I know I slow down a bit; I seem to pay attention to what I'm doing more, which helps correct the less-good and reinforce the more-good.
I can step straight to the line and shoot handguns, but, I have found that I ramp up to operational more, the focus, the muscle memory is all there. Just not a lot of 'stamina' for lack of a better term. It's less good for my skills, too. Rather than "fix" errors, I adjust for them. Knowing this means I also know I can give myself a more "stressful" day, too, if that seems apt.
Reverse seems to be true in going to the long-arm line.
But, that's me; others differ.