Buckhammer74,
I have been talking to Ben over the last couple weeks, he is supposed to be sending me a 7/8" two piece plug. The 209 pocket nipple has a .040" flash hole and 1/4-28 threads. I have been checking the mail as soon as I get home from work since last Monday, but nothing has showed up yet. When it gets here I will test it out with BH209 for compatability and post my results.
Ben said he would look for some NEF's at a gunshow last weekend, but it don't look like he located anything. I haven't talked to him this week, but am getting pretty anxious to try out that plug.
I have been trying to get him to make a 209 plug since 2003, hopefully this comes to fruition. With the Blackhorn 209 powder, there will be a market for them.