![]() Next, we'll dive into the specifics of the 380 ACP, offering a comprehensive overview of its history, ballistics, and applications in the realm of self-defense and personal protection. " Bullet grain" denotes the weight of the projectile, where one grain is equivalent to approximately 1/7000th of a pound.Īssuming that we have a solid foundation on the significance of caliber and bullet characteristics, let's move on to explore the unique features of the 380 ACP and 38 Special cartridges in the subsequent sections. Bullet diameter refers to the width of the projectile, typically measured in hundredths or thousandths of an inch. "ACP" stands for Automatic Colt Pistol, which is commonly used to describe various semi-automatic pistol cartridges developed by Colt. Throughout this blog, we will refer to several key terms related to firearms and ammunition. Let's begin our exploration of the 380 ACP and the 38 Special caliber pistols.Ĭaliber Terms to Know: ACP, Bullet Diameter, Bullet Grain, ACP Cartridge We want to help you understand the differences in performance, terminal ballistics, and practical applications, allowing you to make an educated decision based on your requirements and intended use. Our goal is to present you with a direct and informative analysis of these two calibers. Both the 380 ACP and the 38 Special have a strong following, and each offers unique advantages that cater to different preferences and needs. When it comes to personal protection, choosing the right firearm and caliber is of utmost importance. ![]() Whether you are a seasoned firearm enthusiast or a novice looking to make an informed decision, we have got you covered. In this blog post, we aim to provide you with valuable insights into the nuances of two popular pistol calibers: the 380 ACP and the 38 Special. Our decades of experience in the field make Berry's Bullets the superior choice for all your shooting and reloading needs. That means shooting 9mm Luger in the 9mm cylinder and 38 Special or 357 Mag in the 357 cylinder.Welcome to our comprehensive guide on the differences between 380 ACP and 38 Special caliber pistols. it is never a good idea to shoot a cartridge in any gun that was not designed for it. 1" deeper than a 38 Special chamber, a 38 Special cartridge will headspace properly in a 357 Mag chamber. they headspace on the rim so even though a 357 Mag chamber is about. The reason why 38s and 357s will interchange and shoot reliably is …. But even if the 380 cartridge does fire, the case is likely to rupture. usually so deep that the firing pin will not reach the primer. a 380 Auto cartridge will seat too deep in a 9mm chamber …. Also, a 380 Auto case is slightly smaller in diameter than a 9mm case (.373" for a 380 Auto versus. If you look in any reloading manual or cartridge reference source, you will see a 9mm case is notably longer (.754") than a 380 Auto case (.680"). This concept is called "headspacing on the case mouth", versus "headspacing on a rim" for a 38 or 357 cartridge. This is where the case mouth contacts the transition and stops the case from seating too deep in the chamber. 380 in a 9mm SP101, I suppose that's probably doable since a moon clip acts as the rim and the OAL of the cartridge isn't a factor in that case.įlyingsquirl001, If you look inside the chambers of a 9mm cylinder, you will see a "step" where the case diameter transitions down to bullet diameter. One other thing, is the SP101 also "convertible?" I am aware they make 9mm SP101's, but I figured that swapping the cylinder in a double-action revolver is something a qualified gunsmith ought to do - it's not the simple operation that it is on a single action. I don't (yet) own a 9mm blaclhawk, but I suspect the 9mm cylinders are the same way also due to their lack of a rim. ![]() I supposed that because the ACP cartridge does not have a rim, the "step" is where the cartridge has a stopping point to make sure the rear of the cartridge is in a proper position for the firing pin to work correctly. 45acp cylinder, there is a sort of "step" where the chamber diameter abruptly shrinks. I have a Blackhawk conversion model that shoots both. 380auto out of a 9mm cylinder? Has anybody tried this? Is it potentially bad for the cylinder? 357 magnum cylinder is okay - what about shooting.
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