Ever since I watched Bernth (guitarist/teacher extraordinaire on YT) inform that the proper pick grip for playing fast is laid across the
2nd bone of your first finger, then clamped onto with your thumb (I trust his teachings), I've been gradually moving mine down. I couldn't do it all at once since it felt unnatural at first.
As I worked it towards the 1st knuckle, I started developing a very-unwanted
callous on the side of the tip of my 1st finger. PITA! I'd even go so far as to cut some of it off with fingernail clippers. Yep- a callous from my
pick! I play a lot.

But I'm happy now that I'm comfortable with it where he said to place it, no more callous, and it
has improved my picking.