Sabine Pearlman's intriguing photo series "Ammo" features images of a variety of ammunitions that have been neatly cut in half to reveal the surprisingly varied and intricate contents inside. Pearlman shot a total of 900 cross-sections of ammo, in a World War II bunker in Switzerland last October, documenting the meticulous and dangerous beauty that lies beneath the bullets' casings.
Pearlman hasn't provided captions for the bullets, but a Redditor named DrakeGmbH was able to recognize some of them, providing a little explanation.
1. Some flavor of 5.56x45 loaded with a steel projectile in a copper half-jacket to protect the bore
2. 5.56mm XM216 SPIW Flechette
3. 7.62/.220 Salvo Squeezebore
1. 7.62x51mm Plastic short-range training tracer
2. This one is curious - it looks like a 7.62x51mm but the interior looks like a 'sabotage' cartridge as it appears to be loaded with a blasting cap and a small amount of explosive. I believe it may be a 7.92mm Mauser rather than a 7.62mm NATO based on the case dimensions and bullet construction.
3. 6.5x55mm wood bullet blank (guessing at the cartridge on that one, it looks right!)
1. .450 Adams - the case appears too short and the bullet is too short, the cavity too shallow and it doesn't have enough grease grooves to be a .455 MkII.
2. .38 Speer Target
1. .38 Special Glaser Blue Safety Slug
2. .224 BOZ
1. 9x19mm Cobra "High Safety Ammunition" - steel darts inside a polymer sabot
2. 9x19mm Israeli riot control - steel balls embedded in amber resin
1. 9x19mm - looks much like a British 9mm MkIIz
2. 9x19mm - solid brass hollow point - unsure of maker
3. 9x19mm - either a tracer or possibly an explosive projectile. Not sure what that filler is
These are interesting from a mechanical standpoint, and they're also kind of pretty.
Sabine Pearlman's gallery.
Source.
Also, slightly related:
Long exposure photos of a night battle in Vietnam. It looks spectacular.