I've seen some pretty sophisticated jet powered RCs that might be big enough to carry armament.

A double barrel shotgun with RC triggers would give you two tries

.

those blaze orange marking are much more visible than grouse feathers, should be easy to establish a lead.

I remember an episode of Redneck Rocket Science a few months back where the old guy shattered an incoming frozen watermelon (catapult launched to simulate an incoming meteor/asteroid) with a scopesighted .30-06. Several tries with various shotgun loads had failed to stop the melonmeteor.

No sense foolin' around.

Hevi-13 #4's.

:)