mkl
Member
Any double base powder will last longer than you and your children if stored in conditions comfortable to humans. I have heard of, but never experienced, single base powder going bad after many years. Personally, I have both single and double base powder over 30 years old that shoots just like it was new.
Most of what I have read over the years seems to suggest that extreme temperture swings plus age will affect single base powders. As I said, I keep my powders indoors, so I cannot attest to that fact.
Unless you are dealing with black powder, explosion is not an issue as long as you keep the powder in the original container in a non-pressuretight vessel. Smokeless powder burns faster as the pressure increases; unless you store your powder in something so tight and strong (a safe perhaps) that it's similar to a gun chamber, you will never have an "explosion" with smokeless powder.
The water storage is not a good idea.
Most of what I have read over the years seems to suggest that extreme temperture swings plus age will affect single base powders. As I said, I keep my powders indoors, so I cannot attest to that fact.
Unless you are dealing with black powder, explosion is not an issue as long as you keep the powder in the original container in a non-pressuretight vessel. Smokeless powder burns faster as the pressure increases; unless you store your powder in something so tight and strong (a safe perhaps) that it's similar to a gun chamber, you will never have an "explosion" with smokeless powder.
The water storage is not a good idea.