What brand is it?  8250a doesn't turn up soldering irons on google.

That should be about 12 gauge wire.

Sounds like it might be 12 ga. copper Bob, as 12 ga. measures .080"

Just an update from my recent experiment, I needed a new soldering gun anyway so I purchased a Weller D650PK and tried making a couple of coils to give it a go.  First, this gun has a 20%? duty cycle, 1 minute on 4 minutes off... that's their verbiage on the side of the gun.  made a few coils, first out of #12 solid copper, in a minute and a half, didn't do much to the case, (experimental case was Nosler 9.3x74R) hot to the touch but not much change, ran these all in to the expander die (going to .445 diameter) resistance felt the same as untouched brass. 
The second coil made from #8 stranded, had even less effect so we went the other direction, tried #14 stranded, in a minute on the case, there was a hint of blue to the brass, not much change in the "felt" resistance going into the die. 

Annealed brass using a torch  goes very easy into the die...

Maybe the wire size has to be smaller, solid?  I used what I had lying handy so this experiment isn't conclusive, just sharing what I have so far.
Greg

I have quite a stash of that, I may try it -  both the coils and the wire from that era.

I couldn't agree with you more Vall.  I have a rotary table type I'm building that I used a table drive from a microwave that shows considerable promise - and like others of this design, it does a lot of brass in a short while - a three torch manifold, and you load it just as fast as you can. 
I was a skeptic going in to the soldering gun style or the induction type but I thought I'd dabble just a little.

Hey Vall, you're up there in the wooded NW - how about an old circular saw rip blade to move the cases along?

You must have an awful lot of brass to anneal to need automated rotary machinery.
Might just as well incorporate an auto case feeder, maybe one from a Lee might work.
Or a vibratory ramp feeder powered by your tumbler.

Aaron
#1 Torch and Rod

As I mentioned before I use a piece of round rod and my battery drill. Start my mapp gas torch and sit it on the bench. Then just sip the brass in the flame a couple seconds, and drop them in water.
I don't often anneal, but when I do it isn't one or two cases. If I'm annealing for a caliber, then I'm doing 200-400 cases, and although that doesn't take long, I like to make things that make life easier. I could clean my brass with a brush and some soapy water too, but prefer my wet tumbler.
And if I can make a turntable that automatically turns the brass through the flame, and kicks it off at the end, then all I need to do is sit and put a case on at each hole. Simple, fun, and every case will get the exact same treatment.