Are you shooting at a block/bag target with circles on it or are you shooting at a 3D animal? I picked up a small tip from a friend who is one of the best I have seen when it comes to shooting a bow. He taught me that if you aim at the center of the circle (say 5 ring on a paper target) it is a little challenging to hold the pin in the same exact spot every time. So his suggestion was to sight the bow so that you hold your pin right on the bottom of the circle. It gives you a more definite point to shoot at than covering a circular target with a circular pin. My groups improved tremendously and it was so much more noticeable at 40+ yards.
I know that your issue is with the arrow placement, but it might help you from day to day if you have that tiny point of the circle to aim at. "Aim small. Miss small"!
Oh and about the caffeine. I traditionally take a 5 hour energy along for my all day sits. I've drawn on a few deer within 10-15 minutes of taking it and it can be pretty hard to keep the pin where you want it!
I know that your issue is with the arrow placement, but it might help you from day to day if you have that tiny point of the circle to aim at. "Aim small. Miss small"!
Oh and about the caffeine. I traditionally take a 5 hour energy along for my all day sits. I've drawn on a few deer within 10-15 minutes of taking it and it can be pretty hard to keep the pin where you want it!