I would start by trying to tighten up your 20 and 35 yard groups. Your stated 50 yard group is much better than the others, relatively speaking. If you can hold 5" at 50, I think you should set your goal to improve your concentration more at the closer ranges (because, IMO, that has to be what is limiting you at those ranges, based on your 50 yard groups). Loss of concentration and focus is probably the #1 cause of missed and wounded deer shot at ranges from 25 and in.