Ever wonder why the 30-06 is called the ought six? I have a clue, my dad was born in 1916 and he often refered to single digit numbers as "ought something". I believe it was taught in school to put a 0 or "ought" in front of a single digit number to make it clear that it is supposed to be a single digit and not that you forgot the second digit. We do the same thing when filling out computer dates now. Any one have another explainaton please share it as I would be very interested.