Hubcap500 wrote:The Lee reloading manual or powder dipper chart gives volumetric density info.
The Lee manual does not list several recently introduced powders. A more up-to-date list is found at Lee's website, although some of the most recent introductions are missing:
https://leeprecision.com/cgi-data/instruct/VMD.pdf.
Lee likes the VMD measurement because multiplying a cartridge's powder charge in grains will produce the volume of the charge in units of cc (cubic centimeters).
I suspect the tabular volumetric densities, VMD, with units of cc/grain, are in fact calculated by Lee from the manufacturers' published metric density values of grams/cc. However, I cannot find a handy listing of those values, either online or in my library.
Using the Lee values, one can calculate approximate densities with units of weight(mass) per unit volume. For the powders of interest here's a table showing the VMD and densities, ranked in ascending density values:
- Code: Select all
VMD Density
(cc/grain) (grams/cc)
---------- ----------
Lil'Gun 0.0678 0.956
300-MP 0.0667 0.971
H110 0.0656 0.988
1680 0.0655 0.989
(Please post a correction if you find errors.)
--Bob