Dan,
You make good points but to my way of thinking, a .243 is more for the guy who wants one gun for deer and coyotes with an emphasis on deer OR for the guy who really could care less about blowing them up. Oh, I'm sure there are some reloaders who try and get (to some extent) less fur damage with the .24 calibers but really, who can deny that this is an even easier task with the smaller calibers?
If you go one Rim-fireCentral, you'll find that there are quite a few .17HMR coyote hunters who are NOW getting very consistent results on coyotes now that some new bullets have been introduced (GamePoint, XTP) whereas in the beginning of the cartridges introduction, it was sporadic at best. My point is not whether the .17HMR is a great, let alone best, coyote cartridge but a question as to just HOW MUCH is needed to cleanly bag the song dogs? I maintain that with GOOD bullet performance, less energy on impact is needed over a narrower frontal area than is often given credit. The .17 is a NARROW frontal area and doesn't have lots of excess impact energy (even in the centerfire .17's) but can when PROPERLY used deliver clean kills.
In some of these posts, a reader could easily get the idea that a .22-.250 is not enough. My thinking is that a .22-.250 is MORE than enough for coyotes to well over 400 yards. If and when it falls short, it's either a problem of poor bullets (for the job at hand) or poor shooting. Both of these things are the responsibility of the shooter. I will concede that if I didn't care about the hides, then a .243 or .25-06 (a 100gr. Ballistic Tip in this one would be hell to pay well past 500 yard) would be better. What would be even better yet though would be for me to do something about my shooting! If I can't get it done with a .22-.250, then I think the answer lies in the person I see (in the mirror).
The .17Remington is probably the very BEST calling cartridge yet devisded for easy hitting and keeping the hide on the animal in piece OUT TO 300 YARDS. Beyond that, I think the .204 Ruger with the 40gr. bullet should rate more than a few close second looks. It'll beat out a .223 Win. SSM from 300 to 500 yards when both use a 40gr. V-Max. The .204 beats it in energy, trajectory and windage. You really have to go to at least a 55gr. bullet in the .22 to get back in the race. Even when you do, the .204 still recoils alot less (you can EASILY see your shots at 300+). It's EASIER to shoot than a .22-.250, let alone a .243. It's trajectory will beat hell out of the .223SSM's or the .243Win. and let's face it, most hunters who take coyotes way out there are NOT scope clickers. Maybe for prairie dogs but not coyotes. They hold over and into the wind as necessary. The .204 Ruger with the 40gr. V-Max makes that alot easier to do than a .22-250 or .243. And it's hitting at over 2,000fps at 500 yards which means that it is actually hitting harder than a .22 Mag 40gr. bullet at the muzzle. Put one into the chest cavity of a coyote and that's enough. And if a shooter can't place a light-recoilling, super-flat, great wind-bucking bullet into a coyote's chest at a given range, then he needs to either learn how to shoot better or be much more selective of his shots because going to a heavier caliber ain't the answer!
Oh yeah, I also remember reading in some old magazine articles where even the old .243 Win. failed on coyotes. CLEARLY, in those cases, the fault lay with the shooter!
Sorry if I stepped on any toes in this thread. I really didn't mean it that way---this is just something I feel passionate about I guess.--- Mike