Whats the difference .223/ 5.56mm

ghilltim · February 4, 2001, 10:35 PM

I saw a simular question at "The Art of the Rifle". Can you safely use either in an AR-15.
Thanks in advance,

Tim

alan · February 4, 2001, 11:49 PM

5.56mm is bullet diameter in METRIC. Bullet dia used in 223 caliber is, I believe .224"

**Mike Irwin** · February 4, 2001, 11:57 PM

Jump over to "The Rifle" section where this is being discussed right now.

Essentially the ammo appears to be identical, it's the chambers (military vs. commercial) that appear to be the root of the differences.

Bullet diameters are identical between the two rounds, according to my references.

February 4, 2001, 11:57 PM	#3
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,390	Jump over to "The Rifle" section where this is being discussed right now. Essentially the ammo appears to be identical, it's the chambers (military vs. commercial) that appear to be the root of the differences. Bullet diameters are identical between the two rounds, according to my references. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.

February 4, 2001, 10:35 PM	#1
ghilltim Junior Member Join Date: December 6, 2000 Posts: 13	I saw a simular question at "The Art of the Rifle". Can you safely use either in an AR-15. Thanks in advance, Tim

February 4, 2001, 11:49 PM	#2
alan Senior Member Join Date: June 7, 1999 Posts: 3,847	5.56mm is bullet diameter in METRIC. Bullet dia used in 223 caliber is, I believe .224"