.32 Auto (7.65mm Browning) vs .357 SIG Ammo Comparison - Ballistics In – Foundry Outdoors

.32 Auto (7.65mm Browning) vs .357 SIG Ammo Comparison - Ballistics Info & Chart

The following ammunition cartridge ballistics information and chart can be used to approximately compare .32 Auto (7.65mm Browning) vs .357 SIG ammo rounds. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, or jacketing type. As such, the following is for comparative information purposes only and should not be used to make precise predictions of the trajectory, performance, or true ballistics of any particular .32 Auto (7.65mm Browning) or .357 SIG rounds for hunting, target shooting, plinking, or any other usage. The decision for which round is better for a given application should be made with complete information, and this article simply serves as a comparative guide, not the final say.

For more detailed ballistics information please refer to the exact round in question or contact the manufacturer for the pertinent information. True .32 Auto (7.65mm Browning) and .357 SIG ballistics information can vary widely from the displayed information, and it is important to understand that the particular characteristics of a given round can make a substantive difference in its true performance.

Caliber Type Velocity
.32 Auto (7.65mm Browning) Handgun 960 140
.357 SIG Handgun 1380 520


As illustrated in the chart, .32 Auto (7.65mm Browning) rounds - on average - achieve a velocity of about 960 feet per second (fps) while .357 SIG rounds travel at a velocity of 1380 fps. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps. That is to say, .32 Auto (7.65mm Browning) bullets travel 1.1 times the speed of a 737 airplane at cruising speed, while .357 SIG bullets travel 1.6 times that same speed.

Various calibers


Furthermore, the muzzle energy of a .32 Auto (7.65mm Browning) round averages out to 140 ft-lb, while a .357 SIG round averages out to about 520 ft-lb. One way to think about this is as such: a foot-pound is a unit of energy equal to the amount of energy required to raise a weight of one pound a distance of one foot. So a .32 Auto (7.65mm Browning) round exits the barrel with kinetic energy equal to the energy required for linear vertical displacement of 140 pounds through a one foot distance, while a .357 SIG round exiting the barrel has energy equal to the amount required to displace 520 pounds over the same one foot distance. As a rule of thumb, when it comes to hunting, muzzle energy is what many hunters look at when deciding on what caliber of firearm / ammunition to select. Generally speaking, the higher the muzzle energy, the higher the stopping power.

Again, the above is for comparative information purposes only, and you should consult the exact ballistics for the particular .32 Auto (7.65mm Browning) or .357 SIG cartridge you're looking at purchasing.

Please click the above links to take a look at all of the .32 Auto (7.65mm Browning) and .357 SIG ammo we have in stock and ready to ship, and let us know any parting thoughts in the comment section below.

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