And about the dime someone thinks they discovered something they find someone else discovered it before the Internet, about the time someone decides sorting brass by weight and head stamp is the final answer they find they have just started.....sorting brass, again in the 60s a reloader purchased 500 cases, 500 ceases all in one lot, he started sorting then shooting, then sorting the shot cases, before it was over he settled on 40 cases + or -...and then started over on the cases that were culled out. Anyhow, because of his effort I would never claim 'I discovered'.
The Greek had a first or beginning of a word for 'same-o', it was 'iso': isometric, isotonic, ionospheric, isobar etc/. etc..
Reloaders think they have discovered the 'isocase' by sorting by weight through faulty deductive reasoning, meaning, just because the case weight the same does not mean the volume is the same, the case could have a heavy case head and thin body, or, a thin case head and a thick case body, nor does it mean the inside of the case is centered meaning the case wall could the thick on one side and thin on the other, so when it comes to sorting, matching cases by case weight means the sorting process has just started.
I have found 303 British cases as thin as .120 and as thick as .230, I have 30/06 cases with case heads as thin as .200 and as thick as .260+, but who measures? When culling or sorting cases with long volumes are not the same as cases with short columns although the available volume in both cases is the same.
As I said, 500 cases were sorted, the reloader sorted cases for difference and fired for accuracy, he settled on 40 + a few cases, for a test group he used the same rifle, loaded culled cases with the most accurate cases and fired for results, in his opinion he got patterns, then he went back after indexing the cases when fired, when indexed the same, his results was the same, then he indexed the cases 180 degree, fired and got different results. he also tested cases for multiple firings, I sort by head stamp and weight, and I know when it comes to sorting, sorting by weight and head stamp I have just started.
'isocase' as in same 'O', same 'O', out of a lot of 20 cases there is less than a 5% chance there is a perfect case in the lot of 20, and I know there is Norma and match and Lapua etc., it could be a choice, they sort or you sort, again I match by weight and head stamp and for those with short memories the rational for matching by weight and head stamp is for sorting and checking the total weight of the components after loading.
F. Guffey