The .50 caliber is larger in diameter than the .308. If you are referring to the bullets for the .50 BMG and the .308 Winchester, the .50 is MUCH heavier, and much longer than the .308.
It depends there are many different .308 guns.
No.
No, a 303 is a rimmed cartridge, the 308 is rimless.
300 USD or so.
it depends on how much they cost
20-50k, depending on condition.
r5 bulttet
The model 1873 Colt Army .45 revolver was about $17.00.
"caliber" as used in the firearms world can either mean just the bullet diameter, or the inside measure of bore diameter, expressed as a decimal fraction of an inch. And "caliber" can also mean the complete name of a specific cartridge, which might be quite different from some other one using the same caliber bullets. Examples: The caliber ".357 magnum" uses .357" (or 357/1000 inch) bullets. The caliber ".308 Winchester" uses .308" bullets. But the caliber ".30-06 Springfield" ALSO uses those same .308 bullets. But it's a different "caliber" because it's not the same cartridge. The .30-06 has a much longer case that holds more gunpowder.
In my opinion theyre fairly close to each other. Theyre both based on the 30-06 cartridge case. The 270 shoots lighter bullets at higher velocities but the 308 can shoot heavier bullets. I would base a choice depending on the application.
308 miles is a measurement of 308 mile units in length.