A Darne and a Charlin are not the same. A Darne is a toggle operated wedge locked sliding breech, with a secondary rising bite that meets an extension on the barrels. A Charlin is a non locked over-the-center device. The Jagermeister's phobia of either opening at the shot is just that, an irrational fear.
The list of articles over the years on Darne guns is extensive, and anyone who says there aren't many simply hasn't looked very hard.
See, Shooting Sportsman Dec 1989, "Paul Bruchet" by M. McIntosh, Double Gun Journal, "21st Century Jungle G" Stephan Bodio, The Gun Digest 27th edition, 1973 "The Darne Gun" by John T. Amber, The American Rifleman, January 1976 "Americanization of a VC" by Col Frederick E. Roseman, The Doubler Gun Journal, Winter, 1989 "If It's Weird" a defense of the Darne, by Stephen Bodio, Shooter's Bible, #56, 1965 edition, "A Darne Good Bird Gun" by Roger Barlow, Shooting Sportsman, April 1991, "Two Bobwhite and The French Refugee" by Barry G. Davis, Shooting Sportsman, "Darne, One of a Kind" by Stephen Bodio, "Details of a Darne" Robert Fallert, The Double Gun Journal, Autumn 1990, "Le Bon Vieux Darne" Summer, 1996 Double Gun Journal, by your's truly, Gun Review, by Vic Venters, Shooting Sportsman July 1998, "The Bruchet Darne", The American Rifleman, April 1975, "The French Dare to be Original" by Roger Barlow, The American Rifleman, December 1978 "Hunting for Grouse (guns) by Roger Barlow, The Gun Digest, 24th edition 1970, "Gun Proof In France" by Lee Kennett.
Those are the ones I can think of right now, there are more...
Best,
Ted
