The 243. winchester is a fantastic caliber for most game when people dont even realize it. It continues to surprise me. I have a few stories to share about a 243. win.
A few years back my old man and his best friend went way up to northern Quebec to hunt caribou and a lady and her husband just got married and did this trip as there honeymoon. She successfully took two bull caribou with antlers larger then 42". Both shots were within 80 yards but both caribou dropped where they stood.
My neighbor went down to Montana to hunt Mule deer with some of this close buddies and my neighbor borrowed a 243. instead of bringing his 308. He and his guide spotted one at 378 yards. My neighbor set up and dropped the Large 320 lbs, 170" mule deer in its tracks. He aimed high and hit it in the spine. The next year he went down and took a 230 lbs, 173 5/8" mule deer at just over 100 yards and it ran 15 yards and folded up.
My uncle bought a 243. win in a parker hale for ground hogs years and years bag. 10 years ago he bought a 223. rem in a Browning A-bolt Medallion and he put the 243. win away and never touched it since last year. He took it out, mounted an old scope on it. Fired a few rounds to sight in and took both the 223. and the 243. win out coyote hunting
with his son. He took a 260 some odd yard shot with the 243. win and just hammered the yote.
I personally would like to purchase a 243. win for strictly coyote hunting but im in debate with just buying a 22-250 instead. Those are my stories.