Different grip / different part of your finger? I've got a few thousand rounds through my XD-s 9mm EDC with no finger issues....
Might be you just need to callus a bit? I remember when I taught archery in the summers, the first week or two SUCKED until my calluses returned (I did not allow triggers on my range!). I work with some guitarists who also put a layer of super glue on their fingertips before/during long gigs, as a substitute callus.
I was just trying to be humorous.Not a tough-guy comment, just an attempt at constructive suggestion. Any time I pick up a new hobby/habit (rowing machine, cycling, new gun, whatever), the new pressure points need some time to get acclimated. That's all.