it is a 30 cal. rifle
Depending on intended use the answer can be, neither, the 06 or the 30-30.
30-06 is much more powerful.
No. The only .30-06 cartridge is the .30-06 Springfield. The nomenclature .30-06 is a military one, and is unique to that cartridge. .30 indicates the calibre, and 06 indicates the year of adoption by the US military. The 7.62x51 NATO and .308 Winchester cartridges are essentially shortened versions of the .30-06, but do not share the designation of .30-06.
>.30-06
30-06. It HAS to be a 30-06, it wont take a 30/30 or an ordinary 30 caliber.
No
Which Higgins .30-06?
30-06 is more powerful
they have the same diameter but the .30-06 has a higher velocity.
SAMMI shows that the 06 can operate at higher pressures
The 30-06 is physically larger. They preform similar, ballistically, though. 30-06 is the answer to your direct question.
The calibre is approximately .30 inches, and the -06 indicates the year it was adopted by the US military.