Oddly enough if you listen/watch videos or podcasts on the subject they list it as .357 caliber. When American Hunter reviewed it they did the same thing.

Not 100% sure but I think they are trying to present it as the larger caliber because they took themselves out of the market in some straight wall cartridge states that require the round to be .357 caliber or larger.

Curious to see how long it will be around and how effective it really is on game. I'm interested in it but not enough to buy one just yet.