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Q:
What does .30/06 and .30/30 mean? What is the actual caliber of them?

Question by pascal. Uploaded on May 18, 2009

Answers (11)

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from Edward J. Palumbo wrote 4 years 47 weeks ago

The American system of cartridge designation includes an assortment of misnomers or nicknames, and that can be confusing or misleading. Both the .30-'06 and the ,30-30 use thirty caliber bullets (.308" diameter projectiles). The .30-'06 was adopted by the U.S. military in 1906, and the name refers to that date of adoption. You can find a wealth of cartridge history in a good reloading manual, and I won't rehash that here.
European cartridges are named a bit more informatively, to tell you the bullet diameter and case length (in millimeters). So 7x57mm, 6.5x55mm, 7.65x53mm, etc., will tell you quite a bit about the cartridge.
If you're not sufficiently confused, consider that the .218 Bee, .219 Donaldson Wasp, .220 Swift, .221 Fireball, .222 Rem., .223, .224 Weatherby and .225 Winchester all use .224" diameter bullets. In other words, the name doesn't necessarily reflect the bullet diameter; it may be the land-to-land, land-to-groove, or groove-to-groove diameter, or simply a unique name given to differentiate the cartridge from a similar one. Hang in there! It'll all become clearer with time.

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from Far Rider wrote 4 years 47 weeks ago

The ".30" in both is the cartridge's bullet diameter (.308 inches).

The "06" in .30-06 stands for 1906, the year in which the cartridge was adopted by the US Army.

The "30" in .30-30 refers to the original standard load of 30 grains of powder.

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from BuckTheSystem wrote 4 years 47 weeks ago

The word caliber refers to the diameter of the bullet in either inches or mm (.3 would = 3/10 inch diameter). Both of these rounds have the same diameter bullet (.308) as the others have said.

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from Beekeeper wrote 4 years 47 weeks ago

30/06 = 30 caliber - model 1906

30/30 = 30 caliber - 30 grains of smokeless powder in the original standard load

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from CPT BRAD wrote 4 years 47 weeks ago

Beekeeper is it smokeless power or black powder? I know that some cartidges around that time were metallic with black powder. Just curious, no disrespect intended.

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from hjohn429 wrote 4 years 47 weeks ago

Both are 30 calibers. 30/06 means it is 30 caliber and it was made in 1906. 30/30 means it is a 30 caliber bullet using 30 grains of powder. However with modern-day loads the grains of powder is usually different.

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from idahooutdoors wrote 4 years 47 weeks ago

All good answers...

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from rocky d bashaw wrote 4 years 47 weeks ago

i say the same,all good.

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from Skeeb wrote 4 years 44 weeks ago

They are both .30 caliber...

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from whitetailfreek wrote 4 years 1 week ago

I believe that the .30/30 was one of the first brass cased smokeless powder rounds, so therefor, the 30 at the end was a measurement of smokeless powder.

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from Jeff Lalande wrote 3 years 33 weeks ago

This may be a dumb question but why are all 30-30 rifles lever action and 30-06 rifles are either bolt or semi auto?

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from Edward J. Palumbo wrote 4 years 47 weeks ago

The American system of cartridge designation includes an assortment of misnomers or nicknames, and that can be confusing or misleading. Both the .30-'06 and the ,30-30 use thirty caliber bullets (.308" diameter projectiles). The .30-'06 was adopted by the U.S. military in 1906, and the name refers to that date of adoption. You can find a wealth of cartridge history in a good reloading manual, and I won't rehash that here.
European cartridges are named a bit more informatively, to tell you the bullet diameter and case length (in millimeters). So 7x57mm, 6.5x55mm, 7.65x53mm, etc., will tell you quite a bit about the cartridge.
If you're not sufficiently confused, consider that the .218 Bee, .219 Donaldson Wasp, .220 Swift, .221 Fireball, .222 Rem., .223, .224 Weatherby and .225 Winchester all use .224" diameter bullets. In other words, the name doesn't necessarily reflect the bullet diameter; it may be the land-to-land, land-to-groove, or groove-to-groove diameter, or simply a unique name given to differentiate the cartridge from a similar one. Hang in there! It'll all become clearer with time.

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from Far Rider wrote 4 years 47 weeks ago

The ".30" in both is the cartridge's bullet diameter (.308 inches).

The "06" in .30-06 stands for 1906, the year in which the cartridge was adopted by the US Army.

The "30" in .30-30 refers to the original standard load of 30 grains of powder.

+2 Good Comment? | | Report
from BuckTheSystem wrote 4 years 47 weeks ago

The word caliber refers to the diameter of the bullet in either inches or mm (.3 would = 3/10 inch diameter). Both of these rounds have the same diameter bullet (.308) as the others have said.

+2 Good Comment? | | Report
from Beekeeper wrote 4 years 47 weeks ago

30/06 = 30 caliber - model 1906

30/30 = 30 caliber - 30 grains of smokeless powder in the original standard load

+2 Good Comment? | | Report
from hjohn429 wrote 4 years 47 weeks ago

Both are 30 calibers. 30/06 means it is 30 caliber and it was made in 1906. 30/30 means it is a 30 caliber bullet using 30 grains of powder. However with modern-day loads the grains of powder is usually different.

+2 Good Comment? | | Report
from Skeeb wrote 4 years 44 weeks ago

They are both .30 caliber...

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from CPT BRAD wrote 4 years 47 weeks ago

Beekeeper is it smokeless power or black powder? I know that some cartidges around that time were metallic with black powder. Just curious, no disrespect intended.

+1 Good Comment? | | Report
from idahooutdoors wrote 4 years 47 weeks ago

All good answers...

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from rocky d bashaw wrote 4 years 47 weeks ago

i say the same,all good.

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from whitetailfreek wrote 4 years 1 week ago

I believe that the .30/30 was one of the first brass cased smokeless powder rounds, so therefor, the 30 at the end was a measurement of smokeless powder.

+1 Good Comment? | | Report
from Jeff Lalande wrote 3 years 33 weeks ago

This may be a dumb question but why are all 30-30 rifles lever action and 30-06 rifles are either bolt or semi auto?

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