Hoghunter2,
My original reply to your question about the 270 and coyotes must have gotten lost or it timed out. (?)
Couple of points quickly. First, when I lived in Grand Junction, Colorado years ago I got to know the old government hunter and many year Colorado game calling champion, Ken Thompson. He only used his trusty 270; said he could depend on it to bring the animals down at long distances or close, wind, weather, or whatever. He only used 130 and 150 grain bullets. Said he'd rather sew up a hole than lose the coyote or bobcat. And he shot many close and quite a few out to and over 300 yards. Said he'd tried the varmint calibers but always went back to his faithful 270.
I recommend you use partition or bonded bullets. I also learned one trick through the years that I've called and hunted with my 22-250 and other calibers. Whatever caliber you use, load up half a dozen cartridges to around 1700 fps for close shots and put one of them in the chamber as your first shot. (Remember to "paint" the back end of these cartridges with black magic marker so you can tell them apart in the field.) Then back that shot up with your normal "hot" loads. If a coyote or cat comes in close, you won't ruin the hide. If he is out there a ways, take that cartridge out and put it in your pocket, jack in a hot one slowly, and bust him with that one.
Hope this helps. Let us know.
Lord bless,
cap