Picked up a Lee 356-120-TC for 9mm plinking and was looking through all my manuals for load data for W231 and Unique. I found plenty but was amazed how manuals over the years either reduced the published charges or just got rid of them. Couple of examples for Unique and Lyman 356402 120gr TC mold:
Lyman Ideal #38, 1951 - No Start WT or Max WT, just a charged weight of 6.0gr
Lyman 44th, 1967 - Start WT: 4.4, Max WT: 6.0
Lyman Cast 3rd, 1980 - Start WT: 4.3, Max WT: 5.3
Lyman 48th, 2002 - No data for Unique
Lyman 49th, 2015 - No data for Unique
Are the changes due to liability or changes in powder manufacturing?
Just thought it was interesting that 1 mold with 1 powder can change over the years.