The .270 has MUCH more energy than the 30-30.
Depends on the application. If you mean power, the higher the caliber, the more powerful it is. for example, a .22 caliber rifle is much less powerful than a .50 caliber rifle.
WHICH rifle? There is more than one type made in this caliber.
You will have to me more specific. Do you mean any rifle that fires a 30 caliber projectile or 30/06 or 308?
A tank can do far more damage than any rifle.
it depends on what caliber you are using. The larger the caliber, the more damage. But almost any cannon is enough to blow a hole in your house
We can't really answer that until we know WHICH 45 and which 50. In the case of a muzzleloading black powder rifle, the .50 with have more energy, all other things being equal. However, it could also compare a 50 muzzleloader to a .45-70 cartridge rifle, which is more powerful. Caliber alone only tells us the width of the bullet.
Impossible to answer without more information.
Talk to a gunsmith. There is more than one way.
1861 Springfield 58 caliber Rifle Musket 1858 Endfield 3 Band .577 caliber Rifle Musket Sharp's Carbine 50 caliber Sharp's rifle 50 caliber Burnside carbine 52 caliber Spencer repeating carbine 52 caliber Henry Repeating rifle 44-40 rimfire Model 1841 Mississippi Rifle 58 caliber Harper's Ferry 1840 conversion smoothbore 69 caliber (Buck and Ball) This list represents only the more popular rifles. Other firearms such as shotguns (which do not have rifled barrels) and handguns (revovlers) are not listed.
Not more than 100 if that
5-10K or more
Talk to a gunsmith. There is more than one way.