Very nice set of 'dueling pistols', your lucky to own this high quality set made by one of the top French makers that has survived in such nice condition !!
If your also a competitive shooter you will enjoy the accuracy these pistols are capable of once you've developed the correct patch & ball size combo & powder charge..
In my 50+ years experience shooting European rifles & pistols I've found they require less of a powder charge due to their excellent quality rifling patterns & faster twist rifling.
Below is a photo of two pistols, the lower is a .65 cal. French pistol I shoot. Barrel shows it was built by French maker
L Hermite ARQer Bte A Saumur. The 'military style lanyard ring on the butt' on this pistol is typical of most custom pistols ordered by officers & most I've run into were in calibers that could utilize military ammo.
NOTE; unlike most French duelers & target pistols, the majority of military type flint & percussion pistols were also fitted with a steel ramrod 'not shown' in the pistol below. Many of the French military pistols with steel ramrods also have a cup in the end to measure the powder charge, great feature for fast reloads in the field. The upper pistol shown is marked #1 on the tang showing it was originally a set of French dueling pistols in .52 cal., it also has similar styled rifling to the- military pistol version shown in photo. Happy Trails
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