Off the wall powder purchase.
- Thread starter BBQJOE
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dickttx
Member
Does anyone load from a burn rate chart?
What difference does it make that there are several charts and none agree?
Just look at the multitude of manuals and and pick a load to start.
What difference does it make that there are several charts and none agree?
Just look at the multitude of manuals and and pick a load to start.
jerkface11
Member
Because burn rate in a burn box is different from burn rate in a loaded cartridge.
I haven't used 700-X since the late 70's but it was perfect for 1-1/8 oz 12 ga loads and my older brother used it extensively in 38/357/45ACP so I tend to think it is closer to Unique in performance than it is to a fast powder such as Clays.
Looks like you have some load development coming up. That's half the fun!
Be sure to thank your wife.
Looks like you have some load development coming up. That's half the fun!
Be sure to thank your wife.
10 Spot Terminator
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- Feb 6, 2008
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About those burn rate charts of which there are many ,,,
Look to see how many powders each of them list total and apply that to a certain degree as to what # it assigns to a specific powder. Each of these charts is an entitiy unto itself. Not all charts list military cannister powders, or those made by companies such as Scott, ADI, Vectan, Norma and so on which result in specific rating numbers being assigned to a specific powder based on that specific chart. Some early charts have discontinued powders in them . Bear in mind people these are refference charts for burn rates to give you a relative idea where they fall into play but bottom line in any load developement is "pressure" using a given powder at specific wieghts under specific load varaiables brought on by bullet weights and their construction. case capacitys, bullet seating depths and so on. Add to this the need for "magnum" primers for certain powders to get them to light and burn properly that isnt reflected in these burn rate charts either. The charts are great in that it shows you powders within a certain range for your consideration and if you run these against published load data and will allow you to see how the specific characteristics of certain powders in a given load stack up against one another. Even at this the major maunual suppliers will tend to disagree somewhat and leaves you to do some deductive reasoning on your own. They gave us 0pposable thumbs but the rest is circumspect
10 Spot
Look to see how many powders each of them list total and apply that to a certain degree as to what # it assigns to a specific powder. Each of these charts is an entitiy unto itself. Not all charts list military cannister powders, or those made by companies such as Scott, ADI, Vectan, Norma and so on which result in specific rating numbers being assigned to a specific powder based on that specific chart. Some early charts have discontinued powders in them . Bear in mind people these are refference charts for burn rates to give you a relative idea where they fall into play but bottom line in any load developement is "pressure" using a given powder at specific wieghts under specific load varaiables brought on by bullet weights and their construction. case capacitys, bullet seating depths and so on. Add to this the need for "magnum" primers for certain powders to get them to light and burn properly that isnt reflected in these burn rate charts either. The charts are great in that it shows you powders within a certain range for your consideration and if you run these against published load data and will allow you to see how the specific characteristics of certain powders in a given load stack up against one another. Even at this the major maunual suppliers will tend to disagree somewhat and leaves you to do some deductive reasoning on your own. They gave us 0pposable thumbs but the rest is circumspect
10 Spot
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floydster
Member
Why does everything have to be soo complicated
hueyville
Member
It all burns unless you get it wet. Look it up, start a little low, and work it up. Arguing the specifics of different manuals is splitting hairs. No way is every resource going to agree. As long as nobody loses an eye its all good.
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