I have read two articles that have contradictory views of the center barrel of a Le Mat pistol. One said that it's a 20 gauge shotgun barrel (and I saw 'duelist1954" use it thusly). But then I read in a sales article that it's for a round ball, maybe .69 caliber. Any information on what it was used with? Each time I loaded it was with powder, wadding, 5 or 6 00 buckshot, and overshot wad. Either way sounds good to me.