308 rounded to the nearest tens place is 310. 308 rounded to the nearest 100s place is 300. It cannot be rounded to the nearest 1000s place.
It is 75 308 000.
.308
300
300
Only 7.62x51. No other 7.62 round is compatible.
308 is a single number and there is no indication as to how it was arrived at. So there is no possibility of improving on it by estimating.
30-06 because it's a bigger round than the .308 although it might travel slow it has greater impact on the target
no ,7.62 has more impact in the shot you can shoot a .308 in a 7.62 ,but not 7.62 in a .308
No.
Hunting
No, it cannot.