I tried shooting open hand, even with a wrist sling or ring sling I find myself closing my hand trying to "catch" the bow which threw my accuracy off. Now I shoot with my thumb and forefinger loosely closed around the grip. My other 3 fingers are folded in with fingernail side against the grip to help level the bow as needed. Not sure if that adds anything to accuracy but someone taught me that and it works for me so thats how I shoot.