I am just getting started in reloading and am definitely confused. I purchase a Lee Turret Press (still in the mail), dies for the hand guns I want to reload for, primers, bullets and new cases. But I no idea as to what powder I need. I was quite shocked to learn there is powder for rifles, handguns and shotguns. Do they have a "one size fits all" in powder? I intend to rel0ad .41 Magnum and .357 Magnum. Does anyone have a suggestion as to what powder I need for basic plinking and self defense?