[MCF]

The 30-30 name is a left over term from black powder cartridges which listed the caliber first then the amount of powder the cartridge held; 45-70, 44-77, 38-55 etc. However the 30-30, introduced in 1894, was only loaded with smokeless powder of which it used 30 grains of.
The 30-06 was the name of the U.S. cartridge adopted in 1906 which was a modification of the original cartridge adopted it 1903, 30 Caliber model 1906 (https://en.wikipedia.org/wiki/.30-06_Springfield).
Some metric cartridges are listed with bullet diameter then case length; 5.56x45mm, 7.62x51mm, 9.3x62mm etc. they may also add the letter r at the end to designate a rimmed cartridge 7x57r, 9.3x74r etc.
In the U.S. the name of a cartridge is just a name and has little to do with physical size. the 300 Savage is totally different then a 300 Winchester Magnum, other bullet diameter.

[MileHi]

The 30-06 was the name of the U.S. cartridge adopted in 1906 which was a modification of the original cartridge adopted it 1903, 30 Caliber model 1906

That's why I refer to mine as the '03 Improved. {:0)

[wardaddy]

Again not right in the case of 30-30

It’s smokeless powder

Hate to nit

But it is a gun thread lol

To think I avoid public ranges due to know it alls like I’m acting right

30 grains is a pistol load

Hell you can put 60 grains in a Walker if you’re man enough

God forbid the load requirements of black powder for a 00 or four gauge Howdah