"However, while watching deer during the season I frequently positioned the gun as though I might take the shot. Finding a "spot" on a deer at even 75 yds. in low light, when I see 90% of my deer, is more than a notion with open sights. I may try putting up one of those cardboard deer targets and see if the range will let me stay after sundown a few times just to see if my brain can pick a "spot" in low light."

This is the very best training there is. If your state permits it, put a good low light scope on your gun. Pretty often i will put a fist sized rock out,walk off 50 paces and take a shot at it in the low evening light. itrack a lot of deer in the scope, even the running ones. Sometimes one is picked out ofa herd and watched until itprovides an imaginarybroadside or quartering away shot. It has come to the point that the gun just comes up,without conscious thought the scopecrosshairs are in the right place, and the gun goes bang: Flop.