.243---first off good luck. Your 2 inch groups sound good out to 20 yards. 5-6 inch groupings are not considered tight groups so I would not shoot anything out past where you can't make 2-3 inch groups, closer to 2 inches. Ifyou can only shoot out 25 yards then so be it.Most of us shoot at that distance or less when shooting at deer. I wonder why your groups go from 2 inches at 20 yards to 5-6 inches at 30 yards.How are your arrows flying and when is the last time you bought new arrows?GOOD LUCK.