![]() 45 ACP is a better “man stopper” than 9mm with its best loads, but am not sure of by what margin. ![]() That this can be difficult to obtain in the life-and-death fight scenario doesn’t change the necessity for it if we want the opponent to go down for physical rather than psychological reasons. Probably the most important factor in stopping power (regardless of caliber) remains placement. I am equally convinced that gelatin results may or very well may not match what actually occurs in flesh-and-bone targets. 45 ACP bullet will be larger than that from the 9mm and this should make it more effective, but I have not seen a noticeable difference on animals as mentioned previously. I am convinced that the size of the wound channel from an expanded. It would also likely be more effective if the shot was made from the side rather than the front or back. This may be more than required for a straight on, unobstructed chest shot, but it better insures punching the vitals should an intermediate target like an arm get in the way. I do tend to agree that the expanding defensive bullet should penetrate between about 12 and 14”. I do not believe that “they all fall to hardball.” That does not mean that I believe either to be anywhere near the top of the list for self-protection. It is my belief based on data from serious researchers that with FMJ, the 45-caliber automatic is more potent than the 9mm. This web page seems to make a sincere attempt to compare the two on what is apparently a hotly debated topic:Ĭonclusion and Thoughts on 9mm vs. So, it is a balancing act between charge, diameter, and bullet weight regardless of what caliber you are using. Just because a bullet is bigger around does not mean that it is heaver. However, it is easier to fling a smaller bullet like a. 45 has a larger diameter so can accommodate more powder. It takes a bigger charge to fling a bigger bullet. Contrast that with a fully jacketed round that is designed to hold its shape better and will simply poke a nice clean hole. The result is that shortly after penetration all of those ft/lbs of energy are more rapidly dissipated into the target. A hollow point round is designed to mushroom, which causes it to loose all of it’s energy relatively quickly on impact. All of these different configurations behave differently upon impact. There are many different ways a bullet can be put together ranging from a hollow point, to a fragmentary round like a “glaser” to a fully jacketed “hard ball”. However, being heavier also means more ft/lbs of energy delivered at the impact site than a lighter projectile traveling at the same speed. This generally means a projectile that will loose its energy (slow down) quicker. 45 cal is a bigger bullet and thus is heaver. Other components include the weight of the bullet, the bullet configuration, the powder charge used, and the length of the barrel from which it is fired. However, the diameter of a bullet is only one component of the overall ballistics characteristics. 45 caliber is quite a bit bigger around than a 9mm. The answer is not as simple as you would like it to be.įirstly, they are not roughly the same size.
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