Well I'll put my hand up for the 10.75x68 Mauser (423 Mauser). Almost forgotten thou not quite an obselete catridge. Brass and Dies are still available, just !. I've recently did my bit for this classy old round and have just converted an old 1915 Oberndorf mauser to this chambering. Yesterday was my first day at the range and to say I'm pleased with the result is an understatement. Recoil whilst stout, felt only marginal worse than a hot 9.3x62 load and some subsonic Trail Boss loads were a hoot to shoot, loved hearing the 347gr Woodleigh smack into the back wall at the indoor range.