When I started reloading in the mid-1960s Hot loads were quite common , just start at max and work up. They batter the heck out of the gun and don't accomplish much more. A few cartridges that had to be removed with brass rods convinced me that max meant max. Accuracy also suffers not to mention safety. In loading you can make enough minor errors that can cause problems without using too much powder. Just changing bullets of the same weight can cause enough grief. All jacked bullets are not of the same construction. Most bullet companies have websites that can give guidance. Heaven help you if you load Barnes lead free without their data.