Looks promising, but I'll have to actually use up a sleeve of primers to know for sure.
The swage button is ground into the end on an allen wrench. The anvil is just a nail for now. I added a plastic bushing so the case doesn't wiggle around. If it doesn't hold up, I'll have to use up some nicer stock.
[Imgur](https://i.imgur.com/hfGYrv9.jpg)
The swage die also works as a gauge. Here's how far it slips into a commercial pocket.
[Imgur](https://i.imgur.com/6FEhrWI.jpg)
Here's the most extreme crimp I have found, a 4 line staked crimp.
[Imgur](https://i.imgur.com/36SwsQM.jpg)
Here is the same case after a few taps with the swaging die. I didn't try to take a picture of it, but you can see the pocket is left shiny in primarily 4 spots towards the mouth, plus a tiny ring of shine all the way around the rim.
[Imgur](https://i.imgur.com/B0wIboO.jpg)
I've found the normal crimps vary a lot. Sometimes the pocket appears to be perfectly fine without doing anything. Sometimes it needs some work. It's pretty easy to tell just by gauging it.
I'm not going to recommend this, yet, but I'll post a followup if I find out anything more, good or bad.