I was shooting my 45-70 Marlin Cowboy this afternoon. Brought out some old reloads with Vv n133 and 400 gr cast bullets. I was amazed at the corrosion on some of the cases. I shot one just to see what it would do, got a hollow sound, indicating the powder had deteriorated. Wonder how much powder deterioration is in the rounds not showing corrosion. BTW, climate controlled storage.

I remember reading somewhere about Vv powder doing this, can't remember where. These load are probably 15 yrs old, but I'm guessing. W/W brass.

Any info would be appreciated. I like Vv powder, haven't seen such as this with other powders.

DF

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