The original metallic cartridge — Louis-Nicolas Flobert's 1845 invention that started the era of fixed ammunition. The 9mm version is a miniature shotshell still used in European 'garden guns' for quiet pest control.
Type: Shotshell
Introduced: 1845, France
Parent case: None
Standardization: CIP
Bullet diameter: 0.354" (9 mm)
Case length: 0.787" (20 mm)
Overall length: 0.984" (25 mm)
Max pressure: 7,000 PSI
Rim type: Rimfire
Primer: Rimfire
Typical twist rate: 1:18
Muzzle velocity: 600–800 fps
Muzzle energy: 44–78 ft-lbs
Effective range: 10 yd
Common bullet weights: 55 gr
Primary use: Pest Control, Target
Production status: Active
Also known as: 9mm Flobert Shotshell · 9mm Garden Gun · 9x20mmR Flobert
History: Louis-Nicolas Flobert invented the first practical metallic cartridge in 1845 by inserting a projectile into a percussion cap — no separate powder charge, just the priming compound as the propellant. This became the Flobert cartridge, available in several bore sizes. The 9mm Flobert shotshell variant found a lasting niche in European garden guns — break-action rifles used for pest control in…
Notable firearms: Various European Flobert gallery rifles, Belgian Flobert parlor rifles, Garden gun break-actions
Similar cartridges: .22 BB Cap, .22 CB Cap