I like the Husqvarna hammerguns. I have a model 103 cs that I use for clay games, quail and dove. Really nice guns for the money.
I do not have a model 20 but can give you some info from one of my books.
Model 20 B made from 1944-1956, about 28,000 made.
Model 20 and 20 A made from 1901 - 1946, about 50,000 built.
The Lefaucheux action is a little funky, but if you use proper loads, (and the gun is otherwise sound) you should be fine. I think the balance on the ones I have handled is nice. If you end up needing parts, buy an extra one!
The dimensions on my 103 cs and my model 43 are fairly modern and I shoot them fine. However, I have seen a few older Huskies with a lot of drop. If you have a serial number, I can give you a production date.
Take care,
Mike
