You guys are adding a power level. Which is not tied to bore size, "it is BIG BORE" power level and bore size ie 2 different things
All about the common usage of a word or phrase. "Calibre" being a perfect example in the world of guns. Just about every time the word Calibre is used what is really meant is Cartridge.
Actually even "bore size" in common use is bullet diameter. In common usage when "big" is added to "bore" it means power and/or case capacity. If Winchester was to chamber for the 375/06 you can bet it would not be in the same rifles as they chamber for the 375, 416 and 458
And that is the problem. Bore size and life is simpler. The 375 H&H was a suseecfull medium bore used against dangerous game successfully but is is still a medium
It might well be a medium for you and any others but for the vast majority as well as gun makers the 375 is a big bore. If you were to start a guns/hunting site and had forums for Small Bore, Medium Bore and Big Bore then what would be you cut off for Big Bores forum. If you made it 45 and several on this thread have said big bore is 45 and over then without the 375 your Big Bores forum would not be very active.
That case capacity is a factor can be seen by posts on big bore forums. People don't start topics on the 44 Magnum etc. on a Big Bores forum.
As a side note, do you use the word Calibre instead of Cartridge?
