So, did you find out what caused the smoke with the hs6 load back in October? I have used quite a bit of it and have never seen that happen.
I'm not 100% sure. I actually made a typo in my earlier post, I went back over my notebook and it was W231 I worked up for the 124 grain, I ended with 4.3 grains at an OAL of 1.138. So I'm not sure if it's something that happens with the brass plated lead bullets I used, or if my OAL was excessive. Going over the Hodgdon data from my 147gr load,
it called for an OAL of 1.10". I'm definately going to work another set up with a shorter OAL and less powder and see if it happens again.