Here’s a link of some correspondence that a gun aficionado gave to Ian Fleming, in regards to James Bonds’s gun choice. Mr. Boothroyd, as the man was named, sent Fleming not only a thorough “thesis” on what type of gun Mr. Bond should have, but also photographs to go with it.
The man’s arguments were so thorough and in-depth, Ian Fleming responded with great zest to the man’s letter, and immediately changed the gun Bond carried in the next novel, “Dr. No”, as well as giving the name of Bond’s armorer the name of the weapons expert that was a fan. More here:
http://www.lettersofnote.com/2011/06/may-i-suggest-that-mr-bond-be-armed.html