Just read 5 reloading manuals. Everyone is VERY different because they use different standards. Sierra,Hornady, Nosler, Lee, and Lyman. They all have different bullets loads etc. No questions here as they've been studied. One thing that I will emphasize that my father has always done, is cross reference your loads. E.G.: Hornady 50 gr v-max in a 22-250. Both books have different loads. Different maxes and different starters.
You have to remember that every barrel, chamber, vibrations etc., are different in every rifle. Every rifle action, barrel etc, has had different loads factory, or hand rolled. Used in different temps, string of 20 shots in one, 5 in the other. Cleaning regimens,[beeep], even the same powders with different batch numbers.
It's not about speed, its about precision. Kind of like a blueprinted car and one with a bunch of bolt-ons. Blueprinted one may not even be faster; but in the end it will drive smoother, and last longer.
It's amazing what you can gather from a small amount of reading. Also, make sure you re-read the portions on semi-autos for port pressure. I have a Garand, a Rem 750 AND an Ar-15. They are very helpful and knowledgeable; and keep people from thinking you have a full auto rifle.
Don't rush in!!! Just like anything else, "getting into it" takes time. Get a bench, reload manuals, then research on what the best kit for you will be. Take your time and you could save a lot of money. Go one caliber at a time, and work up whats best. You want to do it all at once, but just remember what you are doing. Go one step at a time. It should never be routine.
Don't let anyone else con you into using your equipment while your not there.
And always follow step one : MAKE SURE EVERYTHING IS ORGANIZED BEFORE YOU EVEN BEGIN!!!