If you are talking money.... it is cheaper and worth it to reload, plus you have the added benefit of being able to tailor the rounds to the way you like them. You already know this as you reload for your rifle. I can tell you from experience, that if you shoot pistol lots, even if you like using your single stage press, you will realize that you will need a progressive to keep up. Unless you do like some others and reload all winter and stock pile. When I shoot, I go through lots so I ended up buying a Dillon 550. I have a busy schedule and when I get a chance to stock up I have to make the most of it. In fact as of now I have everything ready to go to reload some .45 so talk to you later.
Lots of members have mentioned it,the defining factor is what is your time is worth to you. Only you can determine that.