Robertd,
Someone who has experimented with this theory at some length claims it definitely helps. My new method of shooting both the R9s and the Seecamp .380, which has even more of a
"finger bite" is to stick my finger in to the crease at the joint. I don't have a problem with the R9 either way though.
I suggest you give it a try. I believe it will help. And of course there's always the tried and true
"place a bandaid on the trigger finger before you shoot" method which many Seecamp .380 shooters use. Or, a thin golf glove or shooting glove.
Actually, I prefer no glove or bandaid but to each thier own.
Regards, Quiet1