In play testing the firing mechanics, we've been using inches. As in 1 inch = 50 yards. However, a few of the play testers suggested using yards, because they said it gave them a more pronounced ambience of the Napoleonic era. The option was put to a vote and surprisingly a few of the others also preferred yards. The majority won; yards it is.
From here on out, all movements and firing ranges will be given in yards, rather than inches. In the rules too! Meaning I'll have to design new rulers.
Oh, well... What's one more thing. Right?