Question about tanks shedding armor piercing rounds.

1: Shelling after leaving the barrel

2:

Refer to this picture

3: Traditional armor-piercing rounds exit the chamber regretting to be affected by drag, while sub-caliber stripped armor-piercing rounds The entire core grows into a long rod shape, so there is very little drag, and the speed is much faster.

4: Modern tanks generally carry only three kinds of ammunition, sub-caliber armor-piercing shells, armor-breaking shells and high-explosive shells (fragmentation).

5: The cores are different, sub-caliber armor-piercing rounds are not stripped and are not rod-shaped.