Haha, what am I even reading here?!?!...Since when is a .22 LR or a 17 Rimfire a 300 yard dog rifle?? On what planet? Wow...just wow...A 22 LR is at most a 50 yard dog rifle, and a 17 is at most a 100 yard dog rifle. You wont even hit a dog at 300 yards with a 22 LR...You can't be serious?? A coyote has 4" vitals, go try and hit some clay pigeons at 300 yards with a 22 LR and get back to me, you may be able to hit them at 300 with a 17 in the greatest conditions, however the energy at that distance, might as well be a horse fly bite... A 223 is barely a legitimate 300 yard dog rifle unless you make a good shot everytime. If not, you'll be chasing that coyote into the next county. Maybe he meant 30 yards with a 22 LR, that's a little more doable, maybe added 1 to many 0s to that 300 number...Do yourself a favor and read up on coyotes and using the right tools for the job, before you go out wounding everything, leaving it to die an inhumane slow death, coyote or not, they deserve a quick clean kill, and rimfires are hardly coyote killers.