Great board you have here with lots of info. I just acquired my first mod 99 via a trade. A 308 with an I on the boss indicating it was made in 1957. I know I made out like a bandit. Spent the better part of the day researching some questions I have but couldn't find them. What year did Savage introduce the 308 caliber? Also there is no model indicated on the receiver..just says Savage 99. What model might I have?