In Masters of the Barebow 5, Jason Wesbrock said something that really stood out to me and kind of goes along the same lines as what you're doing. I don't think I can get it word for word, but basically what he said is that he practices out to 70 yards, even though he doesn't take hunting shots nearly that far. His reasoning was that if your max distance is 25 yards, so you only practice out to 25 yards, then when that 25 yard shot presents itself, you're trying to make the hardest shot that you know how to make on an animal. By practicing further distances, it makes your max range seem a bit easier. It has definitely helped me.