For some perspective, 20mm is 0.787402 inches, so that would be approximately a .79 Caliber projectile.
For comparison, a .50 BMG round exits the muzzle of a rifle anywhere between 2,895 ft/s up to 3,044 ft/s[1].
3,044 ft/s == 927.81 m/s == 0.92781 km/s.
So yes, this 20mm piece of space junk is travelling a lot faster than a bullet, and consequently would carry a lot more energy.
[1] https://en.wikipedia.org/wiki/.50_BMG
For some perspective, 20mm is 0.787402 inches, so that would be approximately a .79 Caliber projectile.
For comparison, a .50 BMG round exits the muzzle of a rifle anywhere between 2,895 ft/s up to 3,044 ft/s[1].
3,044 ft/s == 927.81 m/s == 0.92781 km/s.
So yes, this 20mm piece of space junk is travelling a lot faster than a bullet, and consequently would carry a lot more energy.
[1] https://en.wikipedia.org/wiki/.50_BMG