I've only hand swaged bullets in .38/.357 caliber, but it's slow and labor intensive. It's also not cheap, if you're going to swage jacketed bullets, since the jackets cost almost as much as cast bullets, and in some cases, more.
I've kept my swaging dies for changing the shape of cast bullets and to be able to use cast bullets that would normally be thrown back in the pot due to wrinkles, etc. I go ahead and size and lube them, then swage to another shape, which takes care of the wrinkles.
If you're considering getting into swaging handgun bullets, the dies are expensive and you need a good, stout press. A swaging press will normally run about $300+ for a single stage, and dies are around $130+ for a two die setup from C-H, which is the bare minimum you could do. Dies and presses from Corbon or RCE (Richard Corbon), will cost almost $1,000 in setup.
Unless you need a specific bullet that can't be acquired on the open market, then it's not cost affective to start swaging bullets for volume use, but then that's just my opinion.
Hope this helps.
Fred