![]() ![]() 40 S&W gaining a slight edge beyond 100 yards. The flight path for the lightweight bullets of these rounds is practically the same, with the. 40 S&W have almost the same trajectory out to 100 yards, with absolutely no difference out to fifty. The trajectory data for both these rounds seems quite interesting, because the difference in bullet weight, and case capacity is quite large. Here is the reference data for analyzing the trajectory of these rounds, and to infer their accuracy characteristics. ![]() 9mm vs 40: Ballistics 9mm vs 40: Trajectory ![]() This also ensures that more rounds of the 9 mm can be held inside a similar sized magazine, compared to the. The 9 mm on the other hand, features a more controllable and compact design. 40 S&W has been designed to deliver less recoil than its 10 mm and. This corroborates that extra case capacity to hold more powder for the. 40 S&W fields bullet weights between 135 and 180 grains. The 9 mm bullets have weights in the range of 115 to 147 grains, whereas the. Despite having lesser power, the 9 mm has the same chamber pressure as the. As far as the 9 mm is concerned, it features a smaller overall length (only by a millimeter), and a 50% less case capacity. 40 S&W has characteristics similar to the 10 mm Auto, like headspacing, bullet diameter and some bullet weights. The only noticeable similarity in the dimension characteristics of these rounds is the maximum pressure rating, which is the same. It fires a 0.355 inch diameter bullet, which is a millimeter shy from the. The 9mm is clearly a smaller and thinner case compared to the. 40 S&W is still a significantly popular round among law enforcement agencies in the United States and several other countries of the world. It’s popularity rose after the Federal Assault Weapons Ban of 1994 which prohibited mags with more than ten rounds. ![]() A cartridge that can fire a 0.40 caliber bullet, with handguns similar to the size of the 9mm pistols. S&W saw this as an opportunity to shorten the overall length of the 10 mm Auto, and thus the. The 10 mm Auto was found to be overpowered and less controllable, so the FBI asked Smith & Wesson which was working on this to lessen the amount of powder. 45 ACP were also in the competition, but were discarded. The concept sprung out from the 10 mm Auto which was selected by the FBI after this incident to replace their existing rounds. It all started after the 1986 FBI Miami shootout, when the FBI lost the lives of two agents in the incident and began rethinking to replace their existing underpowered cartridges. It is a rimless, straight walled handgun cartridge that fires a. 40, is a modification of the 10 mm Auto cartridge. This balance of power and controllability is what made this cartridge insanely popular among the military, LEO’s and civilian population. The bullet diameter is appropriate to cause enough damage, and the recoil is exceptionally controllable. The compact design of the cartridge allows more rounds to be had in a magazine, especially the double stack magazines. There is a wide range of load and bullet options for this cartridge, and the price is extremely lucrative. The round was designed to be lethal out to a range of 50 meters (~55 yards), and is very accurate out to that distance. ![]()
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