Hi guys. The count is simple. (Size of object) X (How many times does he fit into the circle) x 10= it grants the distance of the object. Later, they put 1° marks onto the Revi, because of the facilitate of the counting.
You need this book. Here in detail, and more things are written:
Horrido - Des Jagers Schiessfibel (GER). This is the original, german book.
I did not find English translation on the internet (with the Hungarian i guess you can't do nothing
). Many Years ago, I downloaded an English translate from the
www.mission4today.com, which TX-Gunslinger wrote in 2004. I did not find the link of this, but I put the file on our side, from here you may download it:
Horrido - Des Jagers Schiessfibel (ENG) - TX-Gunslinger
Of cousre, all of this work in the game.