Correct nipple size?, Pietta .44 cal, BP, 1858 New Army. Bought it from cabellas. I recently ordered a replacement batch from Thunder ridge. As soon as I opened the package it was obvious they too big. The invoice indicates they are 6 X .75, however, my tap and dye says they're 5/16 X 24. Tried calling them keep getting answering service. Any help would be appreciated.