I'm going to try to explain this to super easy Riley.
Left is a 9mm, middle 223, right 30-06.
Notice how the 9mm bullet itself is bigger but the case is smaller? An object with more mass traveling slower will hold its energy more stable than the much smaller mass (223) traveling faster upon impact.So the bullet "shatters" when it his anything hard (like a tree or cinderblock) this guy shows a similar gel test with lesser ammo (slower) and the result is more what you see from the 9mm. Now, you can read that and think OMG 223 IS WORSE THAN 9MM THATS TOO MUCH! Until you realize that it is very small by rifle standards and wheras in these school settings 223s are actually getting knocked down by walls a much heavier, more traditional, rifle round has more mass and energy and would be going through cinderblock (or trees in the case of vietnam). Your buying into some bullshit man. E still equals M c²
Tulammo .223 55gr Ballistic Gel Test
YouTube · Shop Time
Mar 13, 2015