Slash McCoy
I freehand dog rockets
Should be ANSI. At any rate, the Norton leaves a scratch pattern about twice as deep and prominent as the Naniwa SS, and removes steel almost twice as fast. It truly does behave more like a 600 grit stone. That's not a bad thing, it's just a thing. Even more aggressive than the Chosera 1k, way more aggressive. And that is saying something, since the Chosera is, at least in my observation, more aggressive than the SS. In fact I use the SS to clean up the bevel set on a Chosera. Even though they are rated the same, on the same JIS scale. The grit rating is just a number and doesn't always carry over into real world results in use. Not saying the numbers are pointless because they are relevant. Sort of like sharpness tests vs the shave test. Sharpness test results are useful. Shave test results are real world, and what really matters.Out of interest - do you know if Norton waterstone ratings are ANSI or JIS? (Or something else...)