I've hunted, and hunt, with 223s, and am often left wanting or needing more gun for coyotes.
The only problem I've ever had with a 223 on coyotes has been with a VMax bullet splashing on the shoulder, and failing to penetrate. I really like the VMax's, and use them, but every now and then, one fails to work. I also shoot a 55 grain SP, and a 52 grain HP, both of which will give a coyote a dirt nap in a New York minute. Long shots are rare here where I usually hunt, but I have made a 450 yard shot with a 223 on a coyote. If I hunt in an area that might present me with a long shot, I usually carry a 243.
