I am thinking about getting into reloading also, dzeanah. But for me, it's just one calibre -- .458. I went last night and talked to the guys at the shop about it. I can back up every word that these guys here have told you...I got it all last night, almost to the letter. At first, I wanted to reload for cost too. But like the guys have said -- you won't save a dime. Sure, the indivdiual cost of each round can be reduced, but when you shoot more, you spend more. For me, a cost reduction doesn't matter. My .458 is the only rifle that I shoot that really cost anything (my others are .22mags and .22 LRs -- they might as well be free!). The RCBS Rockchucker can be fitted with their Pggyback system and be made into a progressive press. That way, you don't have to buy an entirely new press, just a new part. And let me make a prediction, once you start reloading, you will get the "wildcat bug." I haven't started yet and I already have it!
Good luck!!
Hueco