I have some really old 38 Special cases that have large pistol primer pockets. What load adjustment should I use?
We recommend that you not use these cases at all. Their great age (most were made in the 1930’s) increases the chance of a case failure, regardless of any load adjustment you make. Today, 38 Special cases are so cheap that it is a case of false economy to reload these cases. Get new ones with the standard small pistol primer pockets.