Hi all.
I want to introduce you (if you are not already aware of it) to the Ordnance Society, a UK based organization that is concerned with ... well .. Ordnance. They publish a really wonderful Journal once a year that is professional in every way. They also have quarterly newsletters that are a bit less formal and often include cannon plans.
Since they are in the UK, the amount of practicle information on the shooting of cannon is somewhat limited. It appears that one does not simply shoot one off on the back 40 on a whim. The kind of information that regularly appears here could easily be turned into an article for either the newsletter or the Journal, and I am sure would be appreciated.
The most interesting thing is that one can get a Life Membership for $280. Annual membership is $35.
I have an index of all the articles that they have published, if you pm me your email I can send it along.
Their website is
http://freespace.virgin.net/ordnance.society/