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Message: <blockquote data-quote="Old_Slapper" data-source="post: 8888133" data-attributes="member: 690458"><p>Yes, enough about the 223/556.  We all agree that the shells exterior is virtually identical, as well as the projectile.  The only differences is in the construction with the 556.  It's a little thicker at the neck, the projectile can be moved a little further out, and it can be packed with a little more powder.  The projectiles are the same grain, shape, and size.  When loaded hot, the 556 will cause more damage.   Otherwise, power-for-power, they will cause the same damage because the bullet weighs the same, are shaped the same, and going the same speed.</p></blockquote><p></p>

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