Always dry measurement (volume/weight) for rice. =)
Edit: I'm not too hot with metric for making saké, but I want to point out that when using US "standard" measurements, everything is done in
volumetric measurements and is based around the standard 10 pound bag (or 5 pound bag if doing a half batch) of rice sold in our markets. You'll notice that discrepancy when reading the guide: the ingredients in the recipe itself are listed by weight because that's how they are sold, but in
the process section of the guide all ingredient amounts are given as
cups (8 fluid ounces). In answer to a request from another forum I added some quick metric conversions, but they're listed in
grams - which I know can't be a correct conversion (8 fluid ounces of rice can't , but all metric recipes I've ever seen for pretty much anything measures all dry ingredients by grams rather than by milliliters.
I did the best I could. If you can improve upon it, I'd welcome any corrections you can suggest. Almost all of those metric amounts came out of
Fred Eckhardt's saké PDF, so I assumed they were pretty accurate.