[Scorpius]

Well these days you work with what you have. Seems to have done well for night power accuracy on my 9mm kimber solo and my 10mm DW Patriot BT :-)
I have one more powder I may try but it's new on the market (pistol power or something like that I forget and not home to check).
As for dirty comments yes that would explain the visible smoke when fired also it would explain the few little yellow looking discs that are in the breech and chamber areas. I had assumed it was probably powder that didn't burn and discolored due to hitting the lube on the rails. I may try to find a newest burn chart and find something faster burning to try as suggested.
As for coal yes I do the magazine trick for my 556 reloads. My bolts are easier .003 off the lands.
For this I found 1.72 worked well for the feed. Not a single jam or missfeed.