I got into predator hunting 2 years ago. I would not use a .22lr on a coyote it is not fair to the animal you want to make the quickest most humane kills you can. I guess it depends on what you want to do. Are ya gonna keep the pelts? If so ya might want to get a .204, .223, .220 swift, .22-250, .243,12/20 gaugenot limited to these but they are a few. With the right bullet selection you could use the bigger guns to save fur. I personally sold my .300 winmag and built and AR15 and Bought a .22-250 bolt action savage. I havea johnny stewart E-caller and it was good to start with but I just got a minaska M1 bandit which is much better caller it was under $500.00 and is awsome it uses a memory card and you can download sounds. It is really fun and I would have to say addidctive good luck.