Cleaning after 50+ black powder shells

[edgarspencer]

I pour boiling water, right from the tea kettle, down each tube. They dry right out from the heat. I don't use any detergent. Lastly, a light squirt of spray oil down the extractor guide hole. I've never had a spec of rust and they shine when I'm done.

[Mike of the Mountain]

Thanks Edgar. Does it matter how much time has elapsed after shooting until you clean them? It was probably 3 hours from the time we had the BP competition until I was able to clean the barrels. I wouldn't think it matters, but I've been wrong once before.