BUNDUKI
I suggest you get a copy of The Express Rifle by Saul Braceras
ISBN number 84-609-1291-4 forward by Tony Sanchez Arino and the English text checked by Paul Roberts of W J Jeffery & Co
it has every thing you ask for as well as load information
there is a problem for me with this book in that it is bi-lingual. Spanish and English.If I was ever going to learn Spanish this is the book.Every time I open the book I always seem to look at the Spanish text first
This book covers nearly all the information you need in selecting,owning and shooting a double rifle.

As mentioned by RJW the British Shotgun Vol 1&2 by Ian Crudgington & David Baker are great reference books and there will soon be a 3rd volume.Safari Press are printing a 3 volume set to be released later in the year.

good shooting

sbs470