Starting load question?

[powell&hyde]

I think the reason loading manuals advise starting at 10% under max is because of the difference in cartridge brass capacities. Remington brass is known to be thicker at the web end of the shell, whereas Winchester brass is thinner. I stumbled on to a site couple years ago where the author has a huge database of different case capacities by different manufactures. The difference will surprise you, if I can find this site again I will post it here.