I think the discussion still comes down to the purpose of the rifle, which can be defined as shooting paper or shooting live targets, and those topics are covered under the current format without the necessity of having a subsection for each bore size. Consider all the .375 threads that have recently popped up. Do we need a medium bore section to cover them, plus a big bore section, plus a small bore section, plus a sub bore section when the discussions primarily concern: who makes what, which bullet is best for white-tailed deer, what rate of twist best stabilizes which bullet, or what group size can be expected at any given range? That being said a dangerous game section might prove interesting for those who never get enough bear defense threads.