Forums / Gun Discussion / .223 vs 5.56

7 years 25 weeks ago, 8:52 PM

gunfanatic

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.223 vs 5.56

waht is the difference between the .223 and the xm193 or m885 and what kind of disadvantages does the .223 have against the xm193 or m885 in terms of velocity and stopping power?

7 years 25 weeks ago, 8:57 PM

runawaygun762

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223/556

The 5.56 leade (distance from bolt face to rifling) is longer than in the 223, meaning the 556 starts crammed against the rifling if chambered in a 223 chamber. There is really no difference in velocity or stopping power between the 223 or the 556 round. The M855 (SS109) is a 62 gr BTFMJ with a penetrator core in it. It is capable of penetrating a steel pot helmet at 600 meters. The M193 is a 55 gr BTFMJ and is really no different from any other 223 round.

"I have always been a soldier. I have known no other life. The calling of arms, I have followed from boyhood. I have never sought another." From The Virtues of War, by Steven Pressfield.
7 years 25 weeks ago, 10:22 PM

mcliberty

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223/5.56

neck angles are different/case thickness/primer pocket crimped

7 years 25 weeks ago, 9:11 PM

dave329

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I have been reading that alot of soldiers that actually use the 556 in combat are very unhappy with it's performance.

7 years 25 weeks ago, 9:29 PM

Reaper308

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5.56 vs. .223

5.56 is loaded to higher pressure than .223

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
7 years 12 weeks ago, 8:39 PM

Derecho

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.223 vs 5.56

I'm no expert on ammo, especially this 40 year discussion.
The .223 was originally the .222 special and eventually the .223 name stuck. (w/ the AR-15 entry)

Anyways... supposedly safe to shoot .223 in rifles chambered in 5.56, but not ok to shoot 5.56 in a .223 chambered rifle because of the neck and pressures.

My DPMS has .223 - 5.56mm stamped on the lower and they recommend the 5.56 x 45 for it. The .223 shoots just fine.

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