Mehavey,
Mystery solved. Here's what caused the difference: I'm in the habit of running the bullet caliber search function so I have one file of all brands for each diameter. It looks like I simply hadn't re-run that function for the .357" diameter for several years. As a result, it still had old data from an old Nosler.bul file that says it was created on 5/24/2008. That old file has the .669" inch length listed, while the newer Nosler.bul file has the same .775" number your's does. I was just using my old 357.bul file rather than the newer Nosler file.
Old file segment:
AZAK,
You can post heavier data but need to include the warning described in the sticky at the top of the handloading forum called
REQUIRED READ for those posting Extra Heavy Load Information.