My target range has a draw at 300 so I have to skip from 200 out to 420yrd but at 420 and beyond I use the 3" shoot and see on white board. Makes it super easy to spot hits. The "value pack" comes with 4 to a sheet and like 80 sheets for $20, Enough to last a good long while.
For sighting in I use a 12"x12" Birchwood Casey "Dirty Bird" or the round splatter targets from wally world, Winchester I think. For practice, 8" round steel or most any size rock.