I just had an "Eureka" moment with my bow grip. After reading Charlie Lambs story about hunting with Fred Bear, I was looking at my hand and the positioning on the grip and how close the arrow is to my hand(ala Fred) and I noted for the first time(it seems) the fitted aspect of my recurve grip. I rotated my hand a bit(LH bow)to get a better fit for my thumb,which moved the first joint of "peter pointer" across the front of the bow about 3/4". The fit was much better, the bow was canted a bit away (I was looking at the rest a little more side on)and the string was out of "arm slap" range with my bow arm almost straight. Most importantly my first group of arrows with the new grip shrunk noticeably. And have been since. I'm new at this, so it may be old news, but just looking and playing at/with your grip for a few minutes may be helpful.
TOM