ok here it goes.
i bought 500 pc of lc 68 match/inert primer/crappy condition till fireformed a few times.
in the raw...
322 pcs with neck runout of 000-002(98 pcs.003;12 pcs .004/5)
190-195 broken into 8 groups (6 groups of aprox 50 pcs at 191 to 194.8 +/- .2/.3) one grp 190.9 +/- .9 (33), one grp 195+.9 (25))
unfired volumn 67.3 which is almost 4% below commercial 06 brass
add it all up and i lost 16 pcs for one reason or the other and 52 pcs that were "67", not "68".
throw this all into a bell curve and is what one would expect.
in low pressure cast boolits its probably no big thing, but in a match load or higher pressure bullet loads it will cause a diff......
to really know one would need to fired form the brass probably twice in a single gun and then do volume comparrison of the entire batch of 322 pcs...a great winter project( i did the very thing with a batch of 223 brass).