I have shot head sized balloons well past the 200-300 meter range , using an Eotec. They appeared to be about the same size, if not smaller than the period at the end of this sentence. These were far enough out that if you took your eye off of it you would have trouble re-acquiring it!! (I HAVE WITNESSES, I did it more than once, and the witness is not Air.177!!!
)
Later
Martin