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The Range
Ammo & Reloading
Please explain +P ammo
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<blockquote data-quote="alank2" data-source="post: 1447794" data-attributes="member: 108"><p>Hi,</p><p></p><p></p><p></p><p>Yes, grains on box = bullet weight.</p><p>Bullets are not rated for an amount of powder.</p><p></p><p></p><p></p><p>True manufacturers do not, most of the time the powder they use is "custom" for that particular load.</p><p></p><p></p><p></p><p>A lot to cover here.</p><p></p><p>Powders range from "fast" to "slow" as well as many types, but for now let's just say they range from fast to slow. The speed controls how quickly they build up pressure. Smokeless powder (what is in most cartridges these days) will build up pressure when confined. Out in the open, lighting it will result is fizzing, but no big bang. A fast powder will build pressure very quickly, but the pressure will also fall very quickly. Slower powders are used for magnum loads because they build up pressure steadily and hold it higher for longer. You do NOT want to use a specific amount of powder such as 50% of the bullet weight. There are many reloading books and manuals with "acceptable loads". These are loads with X bullet in Y cartridge using Z powder and they will say start at 10.5 grains and don't go past a maximum of 14.3 grains for example. THEY (the people who made the manual) have a way of testing the pressure level that X/Y/Z combination will produce. NEVER load without reliable load information and NEVER start at the maximum charge weight.</p><p></p><p>+P is only a "valid" designation for certain cartridges such as 38 special or 9mm. These cartridges have a normal pressure limit and also a +P pressure limit that must not be exceeded. So, if you have +P ammunition, you should make sure the gun is in good condition and strong enough to handle it. It is +P because the cartridge produced more than normal pressure (which happens to push the bullet faster!)</p><p></p><p>Bullets do have an ideal speed and pushing light bullets very very fast can cause them to fragment depending on what they hit.</p><p></p><p>Get a reloading manual and it will be a great read!!!</p><p></p><p>Good luck,</p><p></p><p>Alan</p></blockquote><p></p>
[QUOTE="alank2, post: 1447794, member: 108"] Hi, Yes, grains on box = bullet weight. Bullets are not rated for an amount of powder. True manufacturers do not, most of the time the powder they use is "custom" for that particular load. A lot to cover here. Powders range from "fast" to "slow" as well as many types, but for now let's just say they range from fast to slow. The speed controls how quickly they build up pressure. Smokeless powder (what is in most cartridges these days) will build up pressure when confined. Out in the open, lighting it will result is fizzing, but no big bang. A fast powder will build pressure very quickly, but the pressure will also fall very quickly. Slower powders are used for magnum loads because they build up pressure steadily and hold it higher for longer. You do NOT want to use a specific amount of powder such as 50% of the bullet weight. There are many reloading books and manuals with "acceptable loads". These are loads with X bullet in Y cartridge using Z powder and they will say start at 10.5 grains and don't go past a maximum of 14.3 grains for example. THEY (the people who made the manual) have a way of testing the pressure level that X/Y/Z combination will produce. NEVER load without reliable load information and NEVER start at the maximum charge weight. +P is only a "valid" designation for certain cartridges such as 38 special or 9mm. These cartridges have a normal pressure limit and also a +P pressure limit that must not be exceeded. So, if you have +P ammunition, you should make sure the gun is in good condition and strong enough to handle it. It is +P because the cartridge produced more than normal pressure (which happens to push the bullet faster!) Bullets do have an ideal speed and pushing light bullets very very fast can cause them to fragment depending on what they hit. Get a reloading manual and it will be a great read!!! Good luck, Alan [/QUOTE]
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