Question: Why is it that, so frequently, someone will use "caliber" when they really mean "cartridge"? It is a misuse that has become widely accepted (just read through this thread) .
Y'know - .30 Carbine, .30-30 Winchester, .308 Winchester, .30-06 Springfield, .300 Winchester Magnum, 300 Ultra Magnum are all different cartridges but they are all the same caliber.
It's a pet peeve. Rant done.
Pete
PS: I load about 16 calibers (.224, 251, .243,. .356, .357, .308, .311, .312, .375, .416, .429, .452, .457, .468, .500, .510) but about 40 or so different cartridges and gauges.