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The Range
Ammo & Reloading
pressure limits?
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<blockquote data-quote="Blitzfike" data-source="post: 1285905" data-attributes="member: 807"><p>The science of internal ballistics is a very complex subject. Basically, smokeless powder doesn't normally explode like black powder, it "deflagrates", meaning that it burns at varying rates depending on the size of the cartridge, the bore diameter, the weight and makeup of the projectile, the primer, and the amount of crimp to list the most common components of the process. There is much more to it, as to the burning rate of the powder which may be varied by the size and shape of the grains, what they are coated with and whether it is a single base powder (nitrocellulose) or a double base powder. (nitro cell. and nitro gl.) The depth to which you seat the bullet has an effect on the pressure as it changes the inner case capacity in which the powder burns. That is why it is dangerous to seat bullets deeper than the load calls for with certain powders. I load a lot of Accurate #5 in 40SW. I have to be careful when clearing the weapon that when I re-chamber a round, I don't cause the bullet to be seated deeper from repeated chambering. If that happens, the pressures in that particular case powder bullet combination can generate dangerous pressures. You can vary the powder for lighter or heavier bullets to keep pressures within the specified limits. Follow the loading guides and you won't have much problems. Good luck with the hobby. Blitzfike</p></blockquote><p></p>
[QUOTE="Blitzfike, post: 1285905, member: 807"] The science of internal ballistics is a very complex subject. Basically, smokeless powder doesn't normally explode like black powder, it "deflagrates", meaning that it burns at varying rates depending on the size of the cartridge, the bore diameter, the weight and makeup of the projectile, the primer, and the amount of crimp to list the most common components of the process. There is much more to it, as to the burning rate of the powder which may be varied by the size and shape of the grains, what they are coated with and whether it is a single base powder (nitrocellulose) or a double base powder. (nitro cell. and nitro gl.) The depth to which you seat the bullet has an effect on the pressure as it changes the inner case capacity in which the powder burns. That is why it is dangerous to seat bullets deeper than the load calls for with certain powders. I load a lot of Accurate #5 in 40SW. I have to be careful when clearing the weapon that when I re-chamber a round, I don't cause the bullet to be seated deeper from repeated chambering. If that happens, the pressures in that particular case powder bullet combination can generate dangerous pressures. You can vary the powder for lighter or heavier bullets to keep pressures within the specified limits. Follow the loading guides and you won't have much problems. Good luck with the hobby. Blitzfike [/QUOTE]
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