I’m liking the “decoppering ” powders!

[JBT47]

You may want to look at Vihtavuori powders, they now have "decoppering" agents. https://www.vihtavuori.com/powders/vihtavuori-decoppering-agent/

Viht powders seem to burn cleaner than other powders.

 

[loinhunter]

Seat of the pants impression of imr7977 in my 7 rem. Yes, lots of black deposit. Seems to be a complete burn . But the small amount of copper in is tough to get out. Love the accuracy with cci mag and 140gr accubonds.