With the amount of force a caliper exerts when you put the boot in, any binding in the slot or pins should be very evident if it's enough to resist... unless there's a fairly large bit of superfluous crud between the caliper halves or behind the pad forcing them out of alignment then, if it were me, I'd take it out and do some spirited braking somewhere safe .... likely the 'high' bit of the outer pad nearest the hub will wear whatever small bit is needed to true the pad to the disc and give full sweep of the disc area.*
K
* what I'd do and what's 'proper' have been known to diverge! 🙂
The calipers have been rebuilt and the rotors and pads are new. The photo of the rotor is before I did any of this recent work. I haven't driven it with the new brakes yet, because the car is currently without an engine, transmission, or rear axle as everything is getting rebuilt and we're installing a Quaife ATB diff. It will definitely get some "spirited braking", and driving, when all is back together in a couple of months.
