Winchester 748

Originally Posted By: bellerSorry. I didn't realize I had the caps lock on, my bad. I guess a 100% load is just shy of a compressed load if i'm reading you right.

Yup...

Of course it is not a "scientific" term, cuz if you throw the powder ina nd it reaches the base of the bullet, it's 100%, but if you drop the same amount of powder down a drop tube, then it is only a 90% load - same amount of powder, and same velocity/pressure.

Loading density is kinda meaningless (but it sure sounds important
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CatShooter:

As to the term "load density", I will respectfully disagree with your definition as the term relates to a comparison with how much water is required (in grains weight) to fill the case completely.

Thus, you will find some powder loads that are 102% density with powder i.e. they will hold more powder in weight than weight in water. Its a comparison value...but gives an idea as to the gross relative volume left in the case with a respective load.

At least that is the definition I have always read from those (ballistics engineers and gun writers) who refer to the term.
 
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Originally Posted By: BuckeyeSpecialCatShooter:

As to the term "load density", I will respectfully disagree with your definition as the term relates to a comparison with how much water is required (in grains weight) to fill the case completely.

Thus, you will find some powder loads that are 102% density with powder i.e. they will hold more powder in weight than weight in water. Its a comparison value...but gives an idea as to the gross relative volume left in the case with a respective load.

At least that is the definition I have always read from those (ballistics engineers and gun writers) who refer to the term.

I used the phrase in it's original context, which has meaning. In it's current context, it has no meaning to anyone... not even engineers.

Since water has a uniform specific gravity (1.00), and nitrocellulose has a constant specific gravity (1,66), but, because of the varying space between the granules, smokeless powder does not - then what does 100% loading density mean to you in useful terms - nada.

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All that is just a little to technical for me. Does a compressed load make the powder burn faster or is it the burn rate the same whether its compressed or not. I can see it both ways, its the same amount of powder either way, or the compression makes it go high order so to say. (I know its not technically a high order explosive) I'm just wondering for future reference. I've got a load that I like for the 223, but I may play around with it some more. I guess it's one of those things that I'll probably never be completely satisfied.
 
Originally Posted By: bellerAll that is just a little to technical for me. Does a compressed load make the powder burn faster or is it the burn rate the same whether its compressed or not. I can see it both ways, its the same amount of powder either way, or the compression makes it go high order so to say. (I know its not technically a high order explosive) I'm just wondering for future reference. I've got a load that I like for the 223, but I may play around with it some more. I guess it's one of those things that I'll probably never be completely satisfied.

Burn rate stays the same... the powder behaves as normal.
 
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