I've been teaching myself reloading, and so far I've gotten pretty good at .45ACP and 45-70. I would like to start loading .223 and .308. Seeing as how I go through .223 quite a bit faster, I would like to start with that. Should I go with basic RCBS dies, or should I go with something like the Redding type S. What is the difference between 2 and 3 die sets? For .308, I will be wanting to squeeze out every bit of accuracy I can; for .223 I want reasonably accurate ammo for my AR. If I am using mixed brass would I want to go for the RCBS with an expander ball? Could I run into issues with the bushing-type dies with different brass thicknesses? If you have a few pointers on what I might want to look into for .308 that would be really cool too. Pardon my newbie questions, and thanks very much!