Don't tell Son or Thunderbox but if you fire form your new cases with a rubber o-ring and don't say anything about headspace in our forum, then Son or Thunderbox can't chastize you about liking tight headspace. (just keep it quite and don't spread this around outside the U.S.)

Graf & Sons
PRVI BRASS 303 BRITISH UNPRIMED 100/BAG
Price: $45.99
Graf Sons - PRVI BRASS 303 BRITISH UNPRIMED 100/BAG




aimsurplus.com
Prvi Partizan PPU .303 150gn SP 20rd AP303SP150 $13.50
Prvi Partizan PPU .303 150gn SP 20rd