Zach,
Smokey is right, but what would be even better is if you had someone that has been loading for afew years to help you hands on. When your reloading rifle ammo you can be working with presures up to 60,000 psi in some rounds. I think that the .223 has a SAMMI of 55,000 and the .303 of 45,000 psi., but that is from the memory of an old guy. The point is that these are max safe presures and it is very easy to push these presures to over 100,000 psi and then every thing comes unglued and people get hurt bad or killed. Reloading is fun and a good way to save money and shoot more, but you should always put safity first. I`ve been loading my own since 1965 and play with some rounds that there is no loading data for, but untill you know what to watch for in presure signs and understand what you are doing DO NOT go over book max. loads and you really can not do them safley in some of the older rifles. The more you read about internal and external ballistics the more you`ll be able to get out of your reloading.
I would ask around the loacal gun shops for help from someone that been reloading for advice. You`ll find the old guy more than willing to help you get started in a safe way.