I've got a hand rabbit distress call. As well as a couple of the pocket calls. I like the hand one best myself. But the digital pocket calls have a place too. I'll gun and go all day long. If specifically for coyotes cal no longer than 20 min in any one spot. 45 for Bobcats and others...Sometimes you let the coyotes go by hoping for a cat instead. They (coyotes)come in quickly, bobcats are more careful. Don't over call, don't blast out loud right off the bat. If you've got one you got several. You want to be fully camoed, nothing but the whites of your eyes, and scent free. Hiding in a cedar or low pine will do a good job over covering your scent. But blocks your view. I don't worry so much about the wind direction as I do covering my scent up. I like to hunt the openings. I'll set up with with a view of the field, but in the tree line whenever possible, and up a little if possible. Remember when your calling that they are going to look for the sound. So be careful when hand calling. Motion is a dead give away. You don't want to over call any area, I mean that they will become call shy after hearing the call and seeing you. So don't leave any witnesses.
Don't do it too frequently. If your hunting a specific animal, pattern him. then set up so you have the advantage somewhere. Dig out a small hole with fresh dirt piled up like someone just dug 'em out a new home. Do this in good view for you and so the coyote will see it yet not be looking at you while checking it out. Set up, sit down, let things calm down 15 min or so, then start calling very light and very sparingly....Bust 'em good when he comes bouncing in.
I shoot a 22-250 50 grain JHP and 200yrd shots are no problem...
The one above was on the walk, 330 yrds out. Hit him through two cedars as he stepped out. Right in the sweet spot, 10 foot later thar he lay.