I started shooting a three under cordovan leather tab and am getting severe pain and blisters. Anybody else ever experience this? I'm going back to a glove

Is it on the ring finger or all fingers? I know for me that when I don't get a deep enough hook when I grab the string (first knuckle) and am holding the string with just my figer tips, my fingers will get sore.

Look at your original post farther down the page.  Lots of responses there.

I have been using our (EFA) 3 under cordovan tab, with backing and palm tab for a long time and have never had sore fingers. Does your tab have a backing?