I don't think it's the actual action of doing it it's probably caused by the pressure or the repetitions. My wrist doesn't necessarily hurt while I'm loading but it's sore for several days afterward. Between loading a day or two a week and shooting a couple of days a week, I think I'm getting in inflammation in my wrist.
Am I still going to have to put a lot of pressure on my wrist even with a progressive press?
Do not follow where the path may lead, go, instead where there is no path and leave a trail - Ralph Waldo Emerson