280 Shooter, I purchased Turkish and Romanian 8X57, 80 rounds for $4.80, some were 150 + or -, others were 200 grain - a little, all had flake powder, like you I did not want the primers, I formed 30/06 cases using a RCBS trim/form die #15965, 30/06 case length 2.494, 8X57 case length 2.240, that is 25 inches of trimming for 100 cases, that is not much if you are using a hack saw, aircraft counter sink and or a file to finish, it worked.
The shooting range has changed the rules and will not allow FMJ bullets, the Turkish ammo was fast, the 150 grain bullets were running 2900 fps when using the Turkish ammo, I reduced the powder 3 grains on the 150s and 5 grains on the 200s, all of the formed cases were military, FC, LC DEN, UT, no problems, except a few dents and creases, I was told that was not a problem, I was told the dents and creases would 'blow out' this advice was as bad as the wildcat advice on forming cases.
80 cases had 49 grains of powder each, 143 cases contained 1 pound of powder, plus the bullet and 1,400 military 30/06 cases cost me $14.00 dollars and are reloadable, after forming to 8X57, the cases can be used to form 7X57, 257 Roberts, 6.5X257 Roberts, 308 Winchester etc..
I was told the brass would be brittle if it was not already too brittle, with advice from the reloaders that hang out 'in back' I installed the forming die upside down in the press, inserted a case in the shell holder and raised the handle, the case folded like an accordion, prefect circles, brittle brass would collapse and or split, I built a non acceptable method for annealing, so I can not advise you not to do it, I was informed the 'OLD' Mausers had head space issues, I thought forming cases would be a good way to deal with that issue, when forming 8X57 from 30/06 cases, the shoulder is moved back .115, if the person operating the press is in charge they should be able to control shoulder set back (not bumping, bumping sounds like an accident), feeler gage from $4.00 to $11.00 dollars. I do not have an issue with head space on Mausers becausee all of my presses are adjusable, and my presses are not 'springy'.
http://www.turkmauser.com/serialNumbers.aspx
clidk on link, scroll to bottom of SR# page and click 'AMMO'.
F. Guffey