What muzzle velocity and bullet mass might a 9mm pin-fire round have?
The LeMat revolver which was used by the Confederates in the Civil War has a muzzle velocity of 620ft/s for the pinfire version. This was for the 12mm cartridge though. The ratio of bullet weight to powder is very similar for the 9mm cartridge though. A person on gunboards.com forum chronographed his Model 1854 Lefaucheux 12mm pinfire at 490ft/s. The Lefaucheux M1858 (another 12mm one) is listed to have a muzzle velocity of 551ft/s There is such a wide spectrum of numbers because back when these were manufactured there was a lot of variation in the guns, and how tight the cartridges fit in. Out of these three the average velocity is 554ft/s, and like I said, the ratio of bullet weight to powder is very similar for the 9mm cartridge so it would be very similar.
