It is always best to continue research into any ammunition question. However, I researched the 9mm Glisenti caliber for over a year before expanding the article I wrote for the ACCA some years ago. On the original article, I researched it a shorter time, and did not have access to the notes of Allesio Grimaldi, as I did for the rewrite.
Grimaldi’s notes date from the mid-1970s, something to keep in mind for a moment. One note, in answer to a series of questions asked by Lew Curtis, Grimaldi writes: “Mauser M.1916 ctg. The FIOCCHI 1918 (large hst.) ctgs. have truncated bullets, no felt wad and powder charge heavier than Glisenti. Ctgs. were in a sealed 25rd box with a dark reddish brown label.” In another set of notes, tabulating data on Italian 9mm cartridges one by one, he writes: Ball, Automatic Pistol Mauser Mod. 1916. Native des.: Cartuccia a pallottola per pistola automatica Mauser cal. 9mm modello 1916. Produced/adopted: 1918/?. Using countries: Italy. Current Status: Obsolete. Case: Brass; Bullet: 15mm, 8.05g, jacket: Maillechort, Slug: lead; Primer: Brass, Berdan; Propellant: 0.360 g; Ballistics, Velocity: 305 m/sec at 10 meters; Remarks: First manufactured in 1918 for use in captured German Mauser semiautomatic pistols."
On another sheet, for the 9mm M910 Glisenti cartridge, he shows a powder weight of 0.30 grams, which pretty much squares with specimens examined during my research.
Now, were we to take all of this as conjecture, we would have to rethink that when approximately 30 years later, a German cartridge dealer, Peter Petrusic, acquired a full box of these 9mm “FIOCCHI 1918” with the large print headstamp - a 25-round box, caliber-marked “Parabellum 9 m/m.”
All precisely how Grimaldi had described these rounds in the 1970s.
Agreed, it would be nice to find even more documentation - official Italian documents, etc. Unfortunately, they are hard to come by. However, between Grimaldi’s detailed notes covering far more than just this cartridge, and the discovery of a box of ammo precisely as described by Grimaldi, I would accept this as more than just a “story.”
all that said, you will note that in my original reply in this thread, I said that the caqrtridge in question “MAY NOT” be a glisenti round.
Admittedly, in an attempt to not rewrite a very long article here, I did not mention that we felt there was a strong possibility that another use for these 1918 rounds was in the Model 1918 carbine, and that the cartridges were 9mm Glisenti with an increased powder charge for the stronger action of the carbine, and that they were sold off as surplus, in 9m/m Parabellum boxes, after the war. If sold that way, we would assume that the seller had insured that these rounds would operate at least most 9mm Para caliber pistols. If they did, and were boxed as 9m/m Parabellum, then it is up to each individual collector to decide for themselves how to classify them, unless some official documentation is found. Because of the box label, I choose to classify mine as 9m/m Parabellum since the entire idea that they might have been surplused off as I discribed is a theory on my part, without corroboration, and so noted in my article. Actually, there is some corroboration for the surplus theory, although weak, in that Fiocchi boxed and sold, for many years, .455 Webley Auto ammunition made in England, primarily by Eley (but not exclusively). This cartridge was carried in their catalogs for many years, and were probably left over from experiments with a Villar Perosa experimental SMG in that caliber.