Who would leave as gun loaded for 10 years, or even a year? Using real BP even Hickok would empty and reload his every morning. If I have a loaded gun I shoot it(esp. a BP one). The urge to shoot is to much for me to leave one for any length of time. I think my record is 3 days. Also if you have powder thats over a year old your not shootin enuf! I buy 5-6 pounds of powder every year. I have synthetic powder thats 5+ years old ( I didn't buy it)and have had no issues with it. Where did it come from if I didn't buy it? Well up here in Michigan we have BP hunting season for deer, and I have older relatives who decide to quit hunting. The guns usually goes to a son and the powder, ball, caps usually makes it to my house. If you didn't know already I have my own range out back of my house and it gets used,some times alot.