"Published Reloading Manual" as those published and sold by bullet manufacturers (Barns, Hornady, Sierra, etc.), powder manufacturers (Allient, Accutate, Ramshot, etc.), and generic manuals (Lyman, and even Lee). Your Lee Chart supplied with dies and a dipper would be considered, as this example, a "manual".
All the info I needed to assemble safe, accurate ammo, since '86, has come from a published reloading manual. Prior to that I used Lee dippers with Lee's charts.
I pay very little attention to any forum "Expert", Gun Shop Guru, Range Rat, or gun counter clerk, but there seems to be a lot of reloaders (mostly new) that do.. Not that their suggestions are necessarily malicious, just that I've read/heard some really wild/even dangerous "pet loads".