A friend gave me about 8 lbs of H4831 which he had since 1983. I poured it out into a can and there was just a hint of "red" dust, but just a hint. So I decided to give it a try: I loaded up 3 rounds of .303Brit/180 gr. RN using new IMR4831 and
3 rounds of .303Brit/180 gr. RN using the old H4831.
At 100 yds the rounds with the older powder (H4831) were slightly lower from point of aim then were the rounds with the newer IMR powder.
Even though there was some "red" dust in present the powder seemed to preform pretty well when compared to the the newer powder.
What are your thoughts, especially considering that there was just a touch of "red" dust.
thanks
atr