DD,
I'm sure you have read this article, but just in case here is a link to the article that John posted on the forum.
Reloading the Nitro Express

Here is what I am using

I am not compressing my powder, just not allowing it to move around a bunch. I don't think you should compress your powder. The Dacron has some natural springiness to it and I rely on that to hold the powder in place. I have NEVER had a failure to fire or malfunction of one of my handloads using my method, which I believe is outlined in Ross' article.