I kind of suspect they still work well today and they only cost about half as much.
This is true and when I do use 209's in my In-Lines they are standard shotgun primers that I had left over from some reloading supplies I bought. Keep in mind that the reason they came out with these M/L rated ones, was to correct a problem they had not predicted. In my traditionals and the last In-Line I own, I only use #11's or Musket primers. ...
Be Safe !!!