A bud and I used to use the 55 gr poly tips,be it the noslers,sierras are hornadys,(and this be in .223)if the coyotes were out there a little ways they would take em out fine.but we found that under 50 yards the poly tips would blow up on the surface of the coyotes.no penatration.well we lost several dogs to this..I now use the remington psp 55gr.are the sierra 55gr hollow points.the remington psp are seated with the cannuler above the mouth and a slight crimp wtih a lee factory crimp die.and 25 grs of h335 pushing it out the barrel.it has been great on the coyotes.and is accurate out of my H&K 630.