I often see advice given to an poster to "use a slower powder / use a faster powder". Perhaps I have missed it, but I don't recall seeing a powder burn rate listing or chart that could be used for reference. For what it may be worth, I offer this link to the Reload Bench forum's page:
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March 1, 2009, 09:56 PM
March 1, 2009, 10:24 PM
Also try google, lots of charts out their, would give you the links but don't know how. Just google gun powder burn rate chart and you'll find it.
March 2, 2009, 07:35 AM
Be aware that not all burn rate charts agree with each other as to position of some powders on the chart.
Here's Ramshot's site, just click on "burn rates".
March 2, 2009, 08:13 AM
The one I like best is found on page 2 of the Vihta Vuori powder reloading manual HERE (http://www.lapua.com/fileadmin/user_upload/esitteet/VihtavuoriInternationalReloguide2009.pdf). In stead of a serial "1, 2,3" list, it shows how the different brands relate to each other. That's much more useful to me.
March 2, 2009, 08:49 AM
Burn rate charts are usefull, but powders act differently in different calibers. Some do well at low pressures, while others need a lot of pressure. Some build pressure evenly and some get real touchy as they get up there. The only way to know is to try them. Burn rate charts are a tool that can help pick a powder to try, that's all.
March 2, 2009, 11:05 AM
You can pretty much determine a powder burn rate by looking at load data for a specific caliber.
Slower burn rates generally take more powder then faster powder to reach maximum velocity / pressure.
If you looked at .38 Special for instance, and it shows 3.2 grains of Clays as a maximum load.
But then further down it shows 8.4 grains of 2400 as a maximum load.
Guess which one is slower burning?
March 2, 2009, 07:18 PM
I just found an error on the Vihta Vuori burn rate chart. They have Bullseye listed as Ramshot instead of Alliant. Not a big deal in and of itself but a reminder to check multiple sources when working up a new load. Typos can kill if you are not careful.
Smokeless Powder Types and Burn Rates
There are many different smokeless powders available in a wide variety of burning rates. Powders are available in two types of composition; Single base and Double base. Single base powders are made from a straight nitro-cellulose composition. Double base powders contain both nitro-cellulose and a percentage of nitroglycerin. Powders most commonly used by the reloader are available in three types.
1. Extruded or Tubular
This type of powder is most commonly used in rifle cartridges, and is usually single base. However, there are a few which are double base. Burning rate is controlled by composition, grain diameter and length, web thickness, and deterrent coating. Extruded powder can vary greatly in appearance and grain size.
2. Spherical or Ball Powder
Spherical powder can look like tiny round balls or the grains can be flattened. The grains can vary in size, shape, and color. The burning rate of spherical powders can range from a fast pistol powder to very slow rifle powder. All spherical powder is double base and burning rate is determined by chemical composition, grain size, and deterrent coating. Spherical powder, in general, is harder to ignite than extruded powder, therefore magnum primers are recommended in certain loads.
This type of powder is usually double base fast burning, suitable for pistol, shotgun, and light sub-velocity loads in rifles. Flake powders in slower burning rates suitable for rifles are not available in this country, but have been used in Europe.
This list starts at the fastest and progresses to the slowest.