I have two apple trees and a plum tree. The squirrels definitely do a number on the apples. When the apples are ripening I set 110 conibers and snares to keep the off the apples. I eat alot of squirrel in the fall! Haha
I'm in a residential area so discharge of firearms is frowned upon. Could make for good archery practice though.
Call them with a predator call? I've had good results squirrel hunting with a squirrel call