electonic preditor calls

[JackRabbit]

I'm looking at getting into fox and coyote huntig.I would like some advice from huters who use electronic calls,and how effective they are.Where i live and hunt there are coyotes but they are scarce compared to other areas.I've been shooting tons of jackrabbits and i think i'd like going after mr. coyote now. I shoot a 22-250 with a bushnell ELITE3200 4x12x40. Thank you.