I've been reloading for 30+ years, and I did most of my work on a RCBS Rockchucker. Great press. I also have a Lee Turret press, and like was said above it makes changing from one caliber to another extremely easy. HOWEVER, if you are loading different bullets in one caliber you still have to change the seating depth. If that is the case, I'd recommend that you buy a micrometer seating die to make life easier for that caliber. I have used every brand of die available and Redding is the best for the money. RCBS is great, but I simply prefer Redding. Forget the digital scales. They are so finicky that you almost have to use them in a vacuum to get them to read accurately. Unless being off .5 grains on a load suits you, that is. Buy carbide dies for your pistol loading. They do not require lubing the cases and are much easier to use.
I'd also (and this may not be popular here) recommend that you visit and join a few other sites that cater more to the reloading crowd. Accurate Shooter is great, as is Predator Masters. Hunters in general aren't as concerned with itty-bitty groups as are reloaders who also shoot for precision. And you don't have to shoot competition to realize the satisfaction of getting that gun to shoot cloverleafs with your hand loads.
Never, EVER load a recipe that you read on the internet without verifying it with a proven reloading manual or a manufacturers website. It might be safe ..... and it might NOT be safe. Use care. These are the only set of eyes, fingers, and ears that you have at your disposal.
Depending on the degree of precision you are after, you may want to acquire a Hornady headspace gauge set, as well as their bullet seating depth tool. The headspace gauge will not only let you set up your dies to make the brass better fit your gun's chamber, but you will "work" your brass much less and prolong the life immensely.
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Learn the signs of excess pressure. Your brass will tell you lots about the load if you learn how to read what it is telling you.
I never advise anyone to be timid when reloading, but I always advise them to be careful and avoid distractions. I don't have a TV, telephone, or radio in my reloading room. You shouldn't either.
After a while you will be able to devise a "system" that works for you. This is important. It avoids double charges and other errors that will not only destroy your firearm but may do serious damage to your body.
HAVE FUN and be CAREFUL. Never get complacent or take anything for granted. You'll be fine if you go slowly and methodically.