How Many Grains In A Pound Of Smokeless Powder
How Many Grains In A Pound Of Smokeless Powder – From the Repository: Ph.D. Jason Baird dissertation smokeless magazine on powder. Published in the August 2012 issue
If you’re a shooter who likes to fine-tune custom cartridges to fit your competitive needs, this article is for you. As one of the three major components of modern ammunition, the rifle offers the greatest customization possibilities for the ammunition fired. We are pleased that smokeless powder is relatively safe to handle, use and store. Also excuse our misuse of your payment (intentionally or by mistake). It hasn’t always been like this. Today’s smokeless fuel benefits from over one hundred years of continuous development and improvement.
How Many Grains In A Pound Of Smokeless Powder
What we call “smokeless” powder (it’s not powder) is technically combustible, a solid fuel in the form of pellets. It is very different from its predecessor, the explosive we call “black” powder. Since the differences are relevant to this article, let’s start by explaining propellant and black powder.
Hodgdon Powder Cfe223 Smokeless Powder 8 Lbs.
Explosives: When chemical explosives are detonated, they create a wave of heat, light and pressure. Pressure wave a
If you put black powder in something like a gun chamber or an igniter and ignite it, the pressure builds. In the form of explosives, for example, this pressure breaks solid rock apart.
Fuel: Explosives can also be used as fuel. The difference is that propellants are not originally designed to explode, but to release high pressure gases which act to propel the projectile down the barrel.
There are several ways to classify smokeless powder. We just looked at one such category: performance (fuels and explosives). Smokeless powders are also characterized by their composition, grain shape and size, and how they are sold and used.
Vintage Dupont Imr 4831 Smokeless Powder Canister, Empty
Powder composition. In the US, the usual way to describe a smokeless powder is how many key compounds it contains: one, two, or three. Monobasic powders have a main high-energy component: nitrocellulose. Double base powders contain nitroglycerin or nitrodiglycol, which dissolves nitrocellulose. Tribase powders contain an additional energy-rich ingredient, usually nitroguanidine.
When detonated, making them less corrosive to the steel of the barrel than typical nitroglycerin dibase powders. Double base powders
Shape and size of the grain. OK, so what’s so special about the shape and size of fuel particles? There is a direct relationship between the surface area of a smooth grain and how much gas the dust produces when the grain burns. There is also a direct relationship between the volume of gas produced in a confined space (such as a cartridge) and the pressure in the confined space. And the higher the pressure, the higher the burn rate of most fuels. Finally, for a given weight of pellet fuel, smaller pellets result in a larger total surface area. Powder manufacturers take all of these facts into account when choosing grain shapes and sizes for any propellant they design. For example, many slow-burning powders consist of larger grains in the shape of hollow tubes or rods.
Sale of powder. To ensure consistency on handloading tables, powder companies are working hard to create new smokeless powder plates that perform just like the old weights. To achieve this, the manufacturer produces each batch of powder using the same processes and ingredients. We call this type powder
Tested: Hodgdon’s Cfe Pistol Smokeless Powder
Powder because it’s sold in small containers (usually up to eight pounds). A hand loader can usually be relied upon for a well-rounded texture with ground powder.
To ammunition manufacturers who mix the powder according to the desired propellant volume, mass and rate of fire. This is one reason why our loaders buy different powders to find the performance levels they want in their ammunition, and ammunition manufacturers mix (and test) powders to produce the desired results. Sometimes loaders may purchase excess powder or powder (called “pull-down” powder) that results from cartridge ruptures. Note that this type of powder is not a powder in a capsule and will not have the same consistency from batch to powder. If you’re using bulk powder, treat it like new powder when you load new powder with it :t. reduce the amount of each cartridge you’re using with the old powder section by 10 percent and gradually get back to your profit level. You had an old batch of powder.
Use of powder. The most obvious classification of smokeless powder is how we use it: shotgun, handgun, or shotgun powder. Traditionally, these groups are divided by rate of fire, with gunpowder and gunpowder having a higher rate of fire than slow-burning gunpowder, but there is some overlap.
As mentioned above, smokeless powder is an energetic substance capable of extremely high pressures under the right conditions. The powder also burns at relatively high temperatures. Be sure to use only targeted use smokeless powder as ammunition. All other uses are application specific and should be reserved for those with the proper training and tools for such applications.
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…don’t assume that the same weight of different powders with the same burn rate will give the same performance in a cartridge.
This brings us to the basic fact of the safe use and storage of smokeless powder. Since dust is an energy-giving substance, it makes sense to keep the minimum amount of dust needed in one place. Because the powder can create very high pressures, store it so that if it is accidentally ignited, the gas pressure can be released before it reaches the point where the containment system fails and causes a dangerous explosion. Store powders in relatively small quantities in non-flammable storage systems. Store powder in its original container and store no more than a few pounds (few pounds) in NFPA or UL fireproof storage facilities that meet the storage conditions.
Imagine opening your locker, pulling out the eight-pounder 5010 IMR you used last year to load your magnum rifle, unscrewing the top of the powder canister, and — ouch! What does it smell like? Instead of that nice, clean, solventy smell, you’ll find some ammonia or something else unusual in the jar. Time to ditch that dust. Sure, there’s probably $30 worth of powder left in the jar, but what kind of powder? Should you risk a $1,500 shotgun or go to the ER to fix your face?
Why does powder go bad? Powder companies use mixed acids (sulfuric and nitrogen) in the production of most smokeless powders. Any acid left in the powder after preparation will cause the powder to disintegrate. To counteract this, companies add stabilizers that neutralize the remaining acids. Unfortunately, when powders are exposed to humidity and high temperatures, the powders begin to break down and produce further by-products. The powder contains only a limited amount of stabilizer. When a stabilizer is used to neutralize acidic manufacturing residues and decomposition byproducts, any acid produced by further decomposition accelerates the decomposition into a “death spiral” for the dust container.
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When you have smokeless powder that smells or looks bad, dispose of it properly. Do not flush it down the toilet or down the drain, or just throw it in the trash. An open fire can be dangerous if you don’t have the proper tools. Dusts burn, ignite surrounding materials and almost all emit clouds of dangerous gases. In most cases, the dust can be spread on the lawn and disposed of legally and safely. For questions about safe and legal disposal, contact your local waste management authority.
There are many reliable sources for manually downloading smokeless powder usage data for a particular cartridge. Reloading the manuals and some online resources is a good starting point for the data. There’s a lot of great information in the manuals, and if you buy more than one, you’ll notice general information about safety, etc., as well as information you won’t find anywhere else.
Pay special attention to primers listed for specific hand loads. Using a regular or magnum base can make a big difference as it contributes to the overall burn rate.
He usually uses the powder which gives the highest speed at the lowest pressure. Ok, so how do you know the pressure the powder charge creates in this cycle? A good start is Richard Lee
What’s Your Oldest Jar Of Powder??
Guide [reviewed here]. Lee plots the pressures expected from incremental changes in powder loading for many modern cartridges and many different powders. He tries to use data from the same period as the date of the powder batch you have, as the gradual changes between batches of smokeless powder will make older reload data inaccurate.
On a related note, most of you know that you can find powder burn rate charts on online websites and in some reloading guides. These tables list smokeless powders from different companies listed by burn rate. Some uploaders seem to think it’s okay to use this relative ranking instead of re-uploading tables from reputable uploaders. In other words, if you have
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