I was just coming here to say something similar. Also, in addendum, all (if there are exceptions I'm unaware of them) military ammunition is jacketed in this manner. Expanding bullets are against the Geneva Conventions, and they're generally seen as ineffective on the battlefield because they have less penetration and are more likely to kill. Killing is seen as less optimal than seriously wounding a soldier because a wounded soldier diverts resources to see him safely out of danger, while a dead soldier can be left to lie for a while.
I just noticed this.
It's incorrect. A bullet is designed to render a combat stop--enemy combatant not able to return fire. Whether he's dead, incapacitated or just stunned isn't relevant. The battle is for control of territory. The smallest round that will reliably stop the enemy is sufficient, which is why virtually everyone has gone to 5-6mm intermediate power cartridges.
The problem with designing to wound is that if it wounds insufficiently, you don't get a stop. And, few rounds are going to hit center mass and kill anyway.
At 500 yards, 5.56 mm has as much energy as a .45 ACP does at the muzzle. It's still more than enough to kill, if it hits a critical target.
The critical targets are heart, lungs, liver, kidneys and central nervous system. A hit to those has a strong probability of killing, though death may not be instantaneous.
Otherwise, death is dependent upon sufficient trauma, or blood loss.
Also, non-expanding is no longer really relevant. At the time, it referred to specific types of soft lead ammo with the tips cut to encourage expansion, though how effective they were is debatable.
M193 5.56mm penetrates about 4", oscillates sideways, shatters at the cannelure into two large and several smaller pieces. Swedish and West German 7.62mm did this same thing. Modern M855 does so, but only at shorter range, due to velocity vs jacket strength.
Hollowpoints are still permitted in certain roles--for sniping, where it's a matter of bullet construction for accuracy vs for wounding, and for certain special operations where the intent is not to engage against general enemies, but specific individuals. There may also be an exemption for military police performing enforcement missions, not combat missions.