I'd vote for a 243 or any 6mm with better ballistics.
Took my first speed goat with one. 85 grain partition running 3400+ out the muzzle. 225 yards. Ran 20 feet.
They are quite small making hitting the vitals harder so realistically you need a rifle with a decent maximum point blank range. I could get out to 265 yards mpbr with mine.
