The Firing Line Forums - View Single Post - Corrosiveness of BP and storing one loaded without caps?

**Mike Irwin** · July 13, 2011, 08:39 AM

Black powder is hygroscopic, meaning that it will absorb moisture from the air.

So yes, it can lead to rusting even if not fired.

July 13, 2011, 08:39 AM	#4
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,390	Black powder is hygroscopic, meaning that it will absorb moisture from the air. So yes, it can lead to rusting even if not fired. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.