I have researched this topic pretty thoroughly. It seems the biggest concern with older data is if the powder composition has changed over the 40 to 60 years since the data was published. Having talked to people who know powder it seems IMR 3031 is the least likely to have any change. Having said that I feel starting at 29 grains will be enough margin of safety. From there any attempts to shoot the other loads will be based on observations of the 29 grain load results. The loads are from a trusted source I might add.
Darryl
