My Remington 243 heavy barrel varminter from the 80's.
Bought it in Germany, at the rod and gun club.
Shot a few roe deer with it.
Brought it back to the states, and have shot ground squirrels, ground hogs, a pheasant, turkeys, Fox, coyotes, badgers, whitetail deer, mule deer, a fallow deer in Belgium, and an few antelope.
I'm sure I may have missed some critter or 2, but a 243 has been with me a long time.
7x64, would be 2nd.
Many Roe deer, a bear in Maine, a coyote or 2, and a few whitetails.
My 280ai, a few cow elk, and 2 oryx.