Back when I was much more frugal  and I needed brass for my 375 Win Ruger No. 3, I fire formed quite a few 30-30 cases to fit my Ruger.

I annealed the neck and shoulder prior to fire forming, used a small charge of Bullseye or Red Dot - don't remember how much, but probably around 10 grains - then filled the case with Cream of Wheat and fired the rifle straight up in the air. Result was a nicely ironed-out case.

8-10. grains of bullseye,cream of wheat. Fired straight up, works for 38-50 Rem and 40-60 Maynard

Mick,

Cream of Wheat is a ground wheat porridge. (You need to Login or Register to view media files and links)
Do you have corn meal in Oz?

Thanks to all for your help, I can scrounge some pistol powder from someone around here and I am reliably informed that cream of wheat is available at the supermarket.
Mike.

Expand case neck to diameter and depth required. Anneal after.
Bullet or wad for breech seat.
Normal load, shoot as any practice round. Sometimes surprisingly accurate. Nice fire-form.
Chuck

Mick B,
          G,day Mick if you can't find COW rice flour works a treat,I use 10gns Red Dot ,fill the case with rice flour and top it with a LDP wad. 

      Cheers Mal.

Well things got worse with my fire forming efforts, perhaps I didn't use the right powder, ( 10 gr ), which I was assured was equal to bullseye powder. Secondly, as I could not find cream of wheat or rice flour I used oat bran.
As a result the cases were not blown out enough in the neck area to accept my .40 cal bullet.
At this point  things went badly wrong when I tried to solve the problem by using my expander plug to open up the case necks to accept the bullet. The end result of this action was that as the neck was expanded, it was also forced downward causing a bulge below the neck area. The case would not chamber in the rifle.  I thought running it  through the FL die would cure this problem but the case went into the die without a problem which indicated to me that my chamber may be pretty tight.
At this point I decided to force a case into the rifles using a flat ended punch and a light hammer. As the Stevens has a weak extractor I had to use a cleaning rod to eject the case. 
I then went through this procedure with a further 19 cases and loaded them with 57 gr of 2F and my 415 gr money bullet.
All were fired with no ill effect, other than the fact that the case had to be pushed out with the cleaning rod after each firing.
These fired cases are still difficult to chamber requiring force to fully seat. There is still evidence of a slight bulge below the case neck where the case is approximately two thou larger in diameter than my normal cases that were purchased from BACO. The cases I got from BACO were formed from 30/40 Krag brass. As there was no evidence of fire forming showing on these cases I presume another method was used.
As a matter of interest the cases made from 303 British came out twenty thou shorter than the brass I got from BACO, perhaps another firing using a load of Swiss 1.5 may cause them to lengthen a little further when the slight bulge is ironed out more. All this has taught me a valuable lesson, don't do it again.
Mike.