<https://www.handgunsandammunition.com/threads/how-relevant-is-speed-and-energy-of-a-9x19-bullet.300/>
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"Hy Folks,\r\n\r\nIt is very clear for me that there are two main groups of bullets. The hollow point and similar that are used for self defense and the standard ones. Penetration and stopping power. But now, after reading twoguns comments in Hydra shock bullets and speed, a new question comes to my mind, and this is the relevance for speed and energy.\r\n\r\nUsing Hydra shock as a self defense bullet: there are at least three different kinds of Hydra shock. For normal hollow point, there are even more variations, with lots of differences in weight, speed and energy. There are even more differences when you search the standard 9 mm FMJ bullets.\r\n\r\nMost of the time, you will use a pistol in a distance that is less than 50 meters. In sports and in self defense.\r\n\r\nWhich kind of bullet should I choose and in which circumstances?\r\n\r\nFor self defense, what is the real difference between a fast and a slow bullet? If I had had to carry a pistol for self defense proposes, or as a LEO, which bullets should I carry? A Magazine with each kind? If I would carry different models of bullets for each situation, I might carry more than 5 Kg of bullets, what I find is nonsense. If I compete in IPSC, I should have some magazines for longer distances and shorter distances, for metal poppers and for paper standard targets, and looking for the proper magazine or remembering which of the magazines has which bullet would take so much time, that I would have no chance in a competition.\r\n\r\nYesterday, when I went to the range to train or to compete, I had no further thoughts as taking same kind and branch bullets with me, so there will not be big differences in targeting as if I would have different kind of ammo. \r\n\r\nToday, after twoguns post in Hydra shock, I will go home, see my potpourri of bullets, because I really have a potpourri of bullets due the difficulties to find ammo here, and I will not be able to take a decision of which ones I should take to the competition. \r\n\r\nI guess this is a part of the learning process, so I request you all to place as many comments as possible regarding this topic.\r\n\r\nthanks"
<https://www.handgunsandammunition.com/threads/how-relevant-is-speed-and-energy-of-a-9x19-bullet.300/>