With a zinger caliber like yours, you can sight in for 0.5-1" high at 200 yards and don't have to compensate much out to 350 yards. Personally my long range shooting tops out at 350 yards with a 9x scope hunting antelope. I sometimes wonder if a higher mag scope would help, as at that distance, the animal sure looks small in the sights. But even with perfect sights, you will have wind to worry about at large distances on the open range, so I don't like to push it much beyond 300 yards to ensure a clean kill every time.
For target practice, a 200 yard range will be quite a step up from 100. Strangely enough, you'd think your clover leaf will double in size and that's it. Give it a try.
Beyond 200 yards, it probably is the national forest for you - I don't know of a local range that's longer than 200. Actually I don't know of one past 100 currently. My long shooting is always in the woods - except when I was in LA where they had a nice windy 200 yard range in the angeles forest.
Keep us posted - punch some paper for us! 100, 200, 300!
G