243 and 270............alot of it depends on what weight and type of bullet you can get regular......some bullets are hard to get....
some people will do the majority of their shooting on foxes ....so the 243 is perfect and it has the advantage can be used on deer with good shot placement...........
a more dedicated hunter ..only shooting deer will proberly choose a win 270.....but dependes on the permoission you have and the ranges you shoot at.....
their isnt really a catch all calibre.....all will kill....its down to personal preference