"Bertil Jonell" wrote
Paul J. Adam wrote:
UAVs are going to be really tough gun targets: just look at the size of
them. Aircraft guns aren't a good option, if only because you're going
to need so many rounds per target.

Against so small targets a proximity fuzed shell, or a timed-fuzed
cannister round would be much more effective. The size means that you
don't need direct impacts of 20mm+ to bring it down, and the increased
probability of getting a hit with preformed fragments/subprojectiles
might[1] compensate for the small size.

[1] Well, I think so at least But you'd need to run tests on it to

Cannister will likely never be fired from an aircraft for the same reason
that A-10s fire AP rather than APDS ammunition: the sabot or cannister
casing are an unacceptable FOD hazard to the firing aircraft. Something like
AHEAD or proximity fuzed ammunition might play a role.