Couldn't find a better place to ask these questions. Have acquired some .30-06 military ammo some of which is WWII. The first three pics are black-tipped (armor piercing???) with 1943 dates. The last three pics are orange-tipped (???) with only a "5" for a date. I have others that came with these, but all of them have plain tips. I assume the plain tips are regular ammo. Can anyone confirm what these are and what the "5" means? What is the value of them? Thanks for any help you can provide.