Try them and see if they group good...that's the main thing to consider is finding the weight bullet that is the most accurate,the 40 Grainers would be enough to put down a Coyote with the speed and the ballistic tip it's going to expand after impact and do some serious internal damage.I have used 32 grain bullets in my CZ .204 that flat put down the Coyotes!As of now I'm using 55 grain Hornady V-max bullets in my Savage .223 Bolt-action!