I'm guessing it won't be in demand. Once you get a good average, even with the wet, inconvenient method, there's nothing further to do. Load for that weight, and shoot them. I did my best to weigh 56 cases of Lake City and 30 cases of Lapua. I got extreme spread of at most 0.5-0.6 grains of water capacity for both brands, with the bell curve being very weighted toward the center of the range. Then I loaded 9 cases of the ones that were all the same capacity, in the middle of the range; and I loaded 9 cases of ones from the extremes of the range (5 of least and 4 of greatest capacity). That was from the Lake City batch of 56 cases. I shot the same load in all the cases, the same way (after one cold bore shot to start the day, consecutive days, tripod and rear Edgewood bag, one minute between shots, all indoors at the same temperature and 100 yards). One group was 0.706" and the other group was 0.712", and the smaller group (although they are statistically identical) was from the group of cases at the extremes of weight capacity. This is a fairly small sample, but I have not heard of anyone else obtaining contrary results, who has done any similar test to this extent. I am retired, and shoot almost every day, and I'd rather reload than eat. Somebody else do the same test, and see what happens. If the result keeps being the same, I doubt demand will justify your effort. As always, I could be wrong. The reason I only shot 9-shot groups is because I only ended up with 9 cases out of the 56 I weighed that were at the listed extreme. That's how steep the bell curve was. I stopped weighing Lapua cases after 30, because they were indeed slightly closer to the center of the range; i.e., 0.1 gr less at both the top and the bottom weight capacity. And as anyone who has done this knows, the measurement error is significant from this method. Even given those statistical concerns, there's no significant accuracy advantage that I could demonstrate to justify sorting by case capacity.
