Dude, depending on your age and how good your eyesight is, I wouldn't bother with more than 2 leafs. One for 100 and the other for 200. Anything else is wishful thinking. The only way to get 300 and beyond accuracy is to use a peep.
-------------------- Lo do they call to me,
They bid me take my place among
them in the Halls of Valhalla,
Where the brave may live forever.