G'day Andrew
Dont have a clue about the corn meal method but i remember reading an article by Nick Harvey from Aus Sporting shooter where he said he fireforms using pumpkin skin and a light powder charge. Might be worth an email to him via the magazine? Just a thought
How long before the edge ready mate?
Having used the cornmeal method, be sure and remove the brake first. you have to fiddle with the powder charges a little to get the proper shoulder and it helps to use a little bit of lube on the shoulder.
I like the false shoulder method much better. It is much better and easier to get ignition and not have misfires plus it gives cleaner shoulders the first time and no need to do it twice. you can see both on www.6mmbr.com under the articles section.