I own two Kahrs (PM9 and P380) and both give my trigger finger a blister at the last joint from the end of the finger. Each time I fire, the recoil pinches my finger against the trigger guard. This does not happen on my Glocks. What am I doing wrong?
I think you need to grip the gun a bit higher and have your trigger finger a bit higher as well. You might have "too much" finger on the trigger as well. The reset on a Kahr (I have two) is a bit "positive" to say the least and does take some getting used to.
Sounds like your wrapping your finger around the trigger. Just use the pad of your finger. I shoot my Kahr like a double action revolver. Start high on the trigger and as you pull your finger will slide down the face of the trigger. Sound weird, but it works.
I was getting almost cut from the top edge of the trigger on my p380 as my finger rolled down the during my pull. So I got out some 400-grit paper and did a little work up there and rounded that sharp lip at the top of the trigger, being careful not to remove it. All I did was radius it, that helped me a bunch. I have never had any problem at the bottom.