Back in 2008, Hornady released in pdf format their handwritten data sheets for the 450B. These were available on this site until the recent site shuffle. I think the calguns thread included them, or at least had a link to them. They have been reproduced on other forums, but in muddy jpeg formatting.
I've posted the pdf files here:
LINK to Original HORNADY DATA SHEETS - PDF
They are only 86Kb, so they download pretty quickly. I'll leave them up as long as possible - maybe years. However, very little posted on the internet is as permanent as ink on paper, so download them and print them.
Even better, you can get the very same reloading data by buying the most recent Hornady reloading manual. If you don't have a copy, it's worth the cost. It includes reloading technical advice specifically for the 450B. While most of their advice is available on this forum, it requires a lot of time to ferret out.
--Bob
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edited to update image url