Re: anyone know the formula to fireform brass with cream of wheat?
I have used corn meal much the same as cream of wheat and a soft plug by sticking the neck into a soft bar of soap.
Forget all that stuff. Use Unique or any other fast pistol powder that you have on hand in ratios mentioned. But forget about the filler, it just makes a mess and is completely unnecessary if you keep the rifle pointed straight up and use a wad of rolled up newsprint pushed into the neck, flush. (about a 1-1¼" square). This gives just as well formed shoulders as with the filler.
Of course, you can (also) shoot loaded ammunition, since you are dealing with a 30'06 and are not particularly concerned with barrel life. Actually, I can't figure out why you want the trouble to form 30'06 cases, this technique is usually done with "Improved" cartridges.
Good hunting. LB