Firearms get the historical spotlight, but what about the projectiles they hurl at insane speeds? Here are the innovations that gave rise to modern ammunition. Think of it as 10 rounds of ammo info.
Hornady's Hot New Cartridge: The 22 ARC - Petersen's Hunting
Hornady® Bullets - Hornady Manufacturing, Inc
Firearms HowStuffWorks
Modern Ammunition - A Short History
Projectiles AND Cartridges - Forensic's blog
The Creator of the AR-15 Didn't See This Coming - The Atlantic
The Evolution of Modern Ammunition - The Shooter's Log
Nanomaterials: The New Antimicrobial Magic Bullet
46 Bullet-Shaped Innovations
Military, HowStuffWorks