Thanks for the thread, it's very informative and sorta makes you want to try it yourself (starting? of course, with a gun you might just as well throw away).

I've got a question concerning chrome-lined barrels - can you open them, too? I've been told that if you damage the lining, the corrosion is going to get under the lining, where you can't possibly clean it out, and is going to ruin the barrel - is there any truth in that?