A friend built me a poorboy flintlock 50cal. last winter and am having fun with it, so much that now I would like to add a smoothbore. I have seen adds for both fowler and trade guns in 20g. and "think" that is what I will start with. I would hope to use the smoothbore at woods walks, rendezvous and at re-enactments. Time about 1760-70 place Michigan. My age 60. I like shooting and the wife has enjoyed the rendezvous we have gone to and wants to get envolved with the crafts of the day. What is the differnce between a 20g. fowler and a trade gun and what should I get?