So how much is there to the "decoppering" agent claims, John? Marketing or truth? I haven't played with the others that have it to know myself, yet.
In 1919 IMR # 15� added 2% tin to IMR # 15 to reduce metal fouling from jacketed bullets. (this powder is commonly known as IMR 4064
In 1923 IMR # 17� added 2% tin to IMR # 16 to reduce metal fouling from jacketed bullets. (Commonly known as IMR 3031)
Dupont patented adding Tin dioxide to rifle powder in 1912 or 1913 as a decoppering agent in rifle barrels for the military.
Hatcher or Whelen talked about cutting up Tin foil and putting it in 30.06 cases which decreased the copper fouling in the early rifles designed for the new High pressure 30 cal.
