Yes, good post Dave. Very informative. This read should help a lot of people understand the differences in these powders.

This also reminds me of something I was wanting to ask you. Have you done any more range testing of Blackhorn 209 and the T/C Black Diamond? I am curious of your final analysis of this test, since the open-breech design of the Black Diamond and the Blackhorn 209 are not supposed to be very compatible.