A 20 or 30 MOA base is one option for long range but if you plan to shoot closer distances as well then I would recommend a reticle with some kind of markings like a bushnell DOA, or nikon BDC.
Personally when I'm just messing around (on nearly windless days) I'll set up some balloons about 425 yards away and just aim off the bottom of my cheap 3-9x scope...I align the verticle with the balloon and just have the balloon sitting on the bottom of the sight picture.
BTW, The drop is about 26' for my rifle and ammo at that distance and the time of flight is so long I can fire a 2nd shot before the first impacts....its not as outlandish as it sounds, try it and you will see.