We've got more different cartridges than we need and we have had for a long time (Yeah, I know, what's need got to do with it?) Every so often a company or individual comes up with an idea that they think will generate sales or ensure their spot in shooting history. The problem is, these great developments, if they offer any improvement at all over existing calibers, occupy a niche so narrow that they are only "appreciated" by a small subset of rifle loonies. That's not enough to keep them commercially viable. You will not convince Joe Sixpack that he should spend a bunch of money to upgrade to a tenth of an inch more, or less, of caliber and 120 fps more, or less in velocity to replace the rifle he's killed deer with for the last 12 years. He will be especially resistant to a cartridge that deviates, appearance-wise, from any "normal" cartridge. Yes, the 6.5 CM hit when the stars were aligned just so and made a big splash, Yes, it seems to fulfill all the promises of incredible accuracy. That's probably because it was supposed to be an accuracy thing to from the get-go and most of the rifles and ammunition offered for it are built with accuracy in mind. Still, from the practical standpoint of the requirements most of us have for hunting rifles, it won't do anything a 6.5X55 or .260 Remington won't do. Hell, my Sako 6.5X55 will shoot 130 AB's significantly and consistently under a half inch.
