I am deer hunting in Ohio next week with my dads 45-70. Neither of us have hunted with it much. I have shot some deer with it inside 50 yards. Which i know it is primarily a short distance gun. I am shooting 300 grain Winchester hollow points. I was shooting it on a rest last week and driving tacks at 100 yards. One farm i am hunting is primarily timber, but the other farm is a cut corn field which could present a further shot. Assuming a steady rest and a dead on rifle (which it is) what distance will i be good out to?