so I have been sorting cases by weighing them for years and because I use quickload to find my max load for the individual rifle I weigh the internal volume using water, its something Nick Harvey wrote about years ago when asked about weighing cases, smart bloke
anyway I thought I would put up the weights of the cases and with water that was not looking very good for a test looking for uniform volume at first for those who do weigh there cases to show variances and that the water volume test is the go if you have that much spare time
308 lapua cases
case weight, filled with H2O, H2O weight
177.6gr , 234.5gr, 56.9gr
177.5gr , 234.3gr, 56.6gr
176.3gr , 232.8gr, 56.5gr
175.8gr , 232.2gr, 56.4gr
177.5gr , 234gr, 56.5gr
as you can see some of the weights of the cases are all over the place as is the filled with H2O figures
but the volume weight (H2O weight) is within .5gr and is very acceptable for fairly even pressures
before I started weighing volume I would have culled some of these cases and not used them thinking the volume weight would be unacceptable because of the varying differences in case weight
this test shows how wrong some tests can be although they do sound like they would logically work
so why would you sort your cases out like this, to try and get a lower ES for more uniform groups
its not for everyone
now this is OCD what do you recon Rod_outbak