The fireball that you mention is actually a bursting bomb.This was a mark from the ordinance dept.of the U.S. goverment that was imprinted on most U.S. military weapons.
1934-1935 They were on limited production.
it might be for the Krag rifle, cal. 30/40..... not 30/06
No.
$1000
I'm not quite sure about the 3006, but I know that the longest recorded kill shot with a .308 was at about one and a half miles, possibly more.
100-340
Impossible to answer without a detailed description
codey
50-500 USD or so
100-400 or so
100-500 USD
Depends on condition and parts originality. Range from 300-800