Re: Published Load Data - How Conservative is it?
From what I'm seeing in most calibers it isn't really that conservative unless you like beating stuff up. You can always go higher than SAAMI specs, but you will eventually pay the piper in reduced barrel life, beat up brass, stressed actions, etc.. Check out the pressure graphs I put up on the "4000 fps with a 140 in an stw" thread and compare to published data if you question it.
If you are looking for more like you said, either use a slower powder, a more efficient bullet, or re-chamber for a bigger caliber.