"8X57 of Course ... " - That sounds patronizing.

My question was a fair one. Many people reloading for a Mauser rifle are probably reloading 6.5X55mm, 7X57mm, 7.65X53mm, 11mm, or numerous Mauser 'sporting rounds'.

'pocketshaver', you have been given good advice and suggestions.

Photos of your problem cases might help, but, I am rather certain proper solutions have already been given.