BULLET CROSS SECTIONS

http://www.wired.com/design/2013/07/incredible-cross-sections-of-real-ammunition/#slideid-153732

I saw this and wanted to post it. I found it interesting.

That's interesting, I'm familiar with most of them but there were some that I hadn't seen before. I have several thousand of fletchettes but haven't figured how to use them yet. I hadn't seen them used in a rifle case before. They were intended for use in 12ga shells but the govt was afraid they violated the Geneva convention.

What the heck is the gray one with the two (looks like 5.56) rounds up in the tip?
Sort of looks like a shotgun round but much larger.

Some of them look like they have the capability to harbor multiple rounds for effect, one shot three holes.

If I recall, in VietNam they used handgun rounds that fired multiple projectiles for tunnel clearing. I have never seen a multiple projectile rifle round.