Hi, I have two Remington 700's that I can't date with the barrel code. The first is a 700BDL in .308,custom deluxe, A6265XXX with a blued IAL barrel. The second is a Remington 700 Custom Deluxe blued in 22-250, with a silver barrel marked NK, receiver # B 6539XXX. Any ideas on years. Thanks for...