A- Round vs. Chiseled Round
Examination of some ballistic characteristics can be done
with the naked eye. Cartridge on the left was fired from a
"Glock" automatic pistol, as for the one on the right, it
could have been fired from many different guns, and closer
examination is required.
B- Hand-gun Rifling: Automatic vs. Revolver
The bullet on the left was fired from an automatic pistol,
and the rifling grooves are the same distance apart from
top to bottom. The bullet on the right was fired from a
revolver, and the grooves are wider at the top then at the
bottom, due to slippage.
C- Ejection Marks
Casings are dragged across the edge of the ejection port as
they are being thrown from the weapon, this marks can be
D- Expansion and ballistics.
Many times ballistics can survive extreme impacts, as
demonstrated with this 30 caliber soft-point bullet.