Can't see ANY advantage to having an XC over a .243 in a hunting rifle. Brass is hard to come by and expensive, no loaded ammo, dies are frightfully expensive and hard to find and any accuracy advantage it has is going to be hard to notice in a hunting platform. Only thing I can see is the cool factor. Might have one if it were on a varmint rifle but can't see it on a sporter.
Spot on.
You forgot about running long bullets while still having the cartridge fit into a 2.800" magazine...
A 243 fits fine in a short action with hunting bullets.
