A 12 ga. Shotgun launching #4 buckshot is much easier and more certain.
That gets into some egregious ballistics problems, and while it would work for low elevation light drones, likely helicopter type, higher elevation police or military type fixed wing drones would be a lot harder to take down that way.
A big part of anti-drone technology is flexibility. For higher elevation anti-drones using a balloon platform to get it to altitude so it can fly down at the larger drone, for example. Likewise, the technique it uses can be jamming, physical attack, or even kamikaze attack.
AAA from the ground is a very valid attack, as long as you are covered from sniper attack yourself.
A big advantage of using a raptor attack is that it *could* be a natural attack, and it might even be illegal for the police to shoot at the raptor.
This all is a new entrepreneurial enterprise, so creativity is the name of the game.