Common calibers

[Krilliad]

Hey, I am seeing recently that I may know the guns,and the general saying of 7.62 and 5.56, but what is the common measurements?

Also, I wanna know, whats the - for in something like .30-06? Also grains, anything bout em.(I know what they are, just how do you firgure out amount, quality etc?)

And anything else you think i may not know.  

[I am an eggplant]

7.62/5.56 are metric equivalents for our SAE system's .308 caliber and .223 caliber. So 7.62mm = .308"

The .30-06 was adopted in 1906, so it's just saying that it's a .30 caliber of 1906.

1 grain = 1/7000 of a pound, pretty straightforward.  

[Fresnel]

SierraBT

1 grain = 1/7000 of a pound, pretty straightforward.

The reasoning behind this still eludes me.  

[Krilliad]

Fresnel

SierraBT

1 grain = 1/7000 of a pound, pretty straightforward.

The reasoning behind this still eludes me.

Yes.  

[OberFeldwebel]

Maybe they use it because it has something to do with how it burns?  

[I am an eggplant]

OberFeldwebel

Maybe they use it because it has something to do with how it burns?

Nah, it's used for propellant and bullet weight alike. It's just a unit of measurement used for object that wouldn't be practical to use larger units on.  

[OberFeldwebel]

Oh yeah! :forehead palm:  

[Freak_090]

Mesurements

.223/5.54NATO: 5.56 x 54mm
7.62Soviet: (AK round) 7.62 x 39mm
7.62Russian: ("r" stands for rimmed) 7.62 x 54r
.308 WIN/7.62NATO: 7.62 x 51mm
30-06: 7.62 x 63mm

Warnings:

.223 and 5.56Nato: it is unsafe to fire the 5.56NATO in a weapon chambered for the .223 round due to higher pressures

.308win/ 7.62NATO: It is unsafe to fire .308win in a weapon chambered for 7.62NATO due to slightly different neck demensions. Winchester rounds fired in a NATO chamber can rupture and cause bad JU-JU...  

[Fresnel]

Freak_090

.308 WIN/7.62NATO: 7.62 x 51mm

Did I hear something about a 7.62x50 floating around somewhere?  

[Freak_090]

Fresnel

Freak_090

.308 WIN/7.62NATO: 7.62 x 51mm

Did I hear something about a 7.62x50 floating around somewhere?

I don't think so. There was my search for the chambering of the French MAS rifle a few months back...

this is the first thing i found when searching. Everything else constited of Wildcat rounds (make your own)
http://sketchup.google.com/3dwarehouse/details?mid=8ac78c1137db6f64fe9d581e998c7d53  

[Requiem ex Inferni]

Now for all those who don't know this already.

Magnum= pistol bullet with longer casing, meaning more propellant.

.357 Magnum= .38 Special with longer casing
.44 Magnum= .44 Special with longer casing
.454 Casull= .45 Colt with longer casing
.500 Magnum= original round (I thought it was an upscaled .50 AE originally)