what is the difference between 9mm and 32 caliber?
Velocity. As illustrated in the chart, 9mm Luger (Parabellum) rounds - on average - achieve a velocity of about 1140 feet per second (fps) while . 32 Auto (7.65mm Browning) rounds travel at a velocity of 960 fps. ... 32 Auto (7.65mm Browning) bullets travel 1.1 times that same speed.