I hate to even have this conversation with you Ackman as I hate to give anyone else a chance to read your misguided words. I have never read in any manual that the max listings are meant to be a "rough guidline". I have read in all my manuals that you should NEVER excede the maximum charge listed. I have a few of the manuals from years ago and yes they do alot of times list higher powder charges, and I am sure that has alot to do with liabilities and carelessness of more than one victim, as well as better measuring equiptment and tighter tolerances.And you won't find me listing any examples of loads that are over the limit, although I have had pressure signs like an extremely flattened primer(on a by the book load).
And I would like to see in a manual where it says "rough guidline" as long as you offered to back it up.