Powder Volume Density

M

Marco Califo

New member
I use a Lee PPM, and like it a lot. It came with a table of powder density, which I found useful and accurate for dialing in powder charges. The problem is the Lee list is outdated and does not include newer powders like CFE223, IMR 8208, 4166, and Alliant Auto-Comp.
Is anyone aware of an online reference of Volume Density, or VMD (cc/grains). Accurate lists the VMD of their powders. I wish other manufacturers did.
I am aware that you can calculate this number by:

Micrometer setting
______________________= setting for one grain(cc) (VMD)
Grain weight of sample

That is not my question. I am looking for a more complete reference list of all or most powders made today.
 
Plus you can and should have a scale so you can measure it yourself. One issue is, as you probably noticed on the Accurate site, the bulk density can vary up to 5.6% from one lot to the next with some of their powders. More importantly, it can vary with how the powder was transported and vibrated, especially with stick powders. You probably only need to do this once for a particular canister of powder, then write it on the label with a Sharpie so you know what to use in the future.

So, take your Lee measure and set it on a large number cc's or put the largest disc in, or use one of their scoops to measure some powder onto the scale pan. Do it ten times and take the average number. Divide that average number into the number of cc's you set the measure for, or selected the disc for, or that was molded onto the powder scoop. That's your lot VMD.
 
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