I think overloading a cartridge is like playing Russian Roulette.
I think understanding what you're doing and knowing when a cartridge can be safely loaded hotter is worth a lot more than just blindly following a manual.
The OP isn't asking about overloading a 308 or some other high pressure cartridge. He's asking about loading a low pressure cartridge hotter, in a rifle that is designed around high pressure rounds. It's a perfectly reasonable thing to ask, and is commonly done with a number of other cartridges. The 6.5 Swede and the modern 38 Super +P are good examples.
Seems like we've got a number of anecdotal responses here that have nothing to do with the OP's question.
