As for the scope, it depends on how much you want to spend and what distance you will be hunting. Probably a 3-9 or 4-12 would be good
I would go with a 3x9 or 4x12 scope as you don't need any more magnification for coyotes or big game.As for brand,I would consider the bushnell elite 3200 or perhaps a nikon.As for bullet weight ,I would go with a 70gr to 85gr bullet.You will need to test a few different loads in your rifle and then use the most accurate one.