different powders give different accuracy and accurate loads are almost never max loads. the difference in accuracy from one powder to the next isnt that great. i usually pick a powder that doesnt have to be compressed. cci primers are a middle of the road primer i get em when i can most of them can be used magnum or standard loads.
you will be surprised how fast a rifle cartridge will go through a pound of powder. ill pick a liekly powder and work up loads in .5 grain increments and test for accuracy. then repeat with other powders.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith