I shoot TAC in my Bushy .223 but I have read a couple of recent articles and found the borescope results from their testing of CFE-223 so interesting that I will get some to try. They clearly showed that the powder prevented copper fowling and even reversed it in the barrels that had it. Refer to your Guns and Ammo from like 2 months ago.
Then CFE must have a good amount of Tin Dioxide or Tin dust in it.
IIRC in Hatchers notebook, Whelen or Manns writings, it was mentioned that Dupont patented the addition of tin to thier powders in 1915 due to some people, (probably Hatcher) in the military years before grinding up tin foil and adding it on top of the powder in test loads for the new 06 round to reduce copper fouling which was prevelent, and causing alot of problems at the time. Your comment just got me thinking, and thought it might be interesting.
Swifty
