a simple way that should work fine is find a drill bit the same diameter as the 209 primer and just drill out the primer pocket and then the lip of the 209 primer will keep it from going to far in and just rest against the back of the case head.

I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them. John Wayne-The Shootist