You've not seen a 28lb er up close and personal then?
Beautiful piece of engineering. Engineered superbly to provide a technical solution to a rare problem at a huge cost. Electrically initiated explosive squibs, moving shutters, large quantity of smoke and flash compound and a frag area out to 25-30 metres.
New design costs peanuts and uses kinetic energy principle to keep the miniscule cartridge from premature detonation and placed in a carrier to stop birds hitting it in the first place.