VMD explanation
Posted by on 22 May 2017 09:35 AM


The Volume Measured Density (VMD) of a powder is the volume in cc's (cubic centimeter) that one grain of powder occupies. This can be used to calculate the dipper, disk cavity or powder measure setting required to obtain a desired weight of powder. The powder companies provide a VMD number or value for each type of powder. If you multiply the number of grains you wish to dispense times the VMD value the answer is the theoretical volume in cubic centimeters that are necessary to hold that grain weight of powder. Or grain weight x VMD = cubic centimeters. You can find the Powder VMD's by clicking on instructions at our website (www.leeprecision.com) and scrolling down to the bottom of the page and clicking on Powder VMD's. Once you know the number of cubic centimeters it takes to hold the powder charge you wish to dispense you can choose the proper disks. You choose the disk combination that is closest in size to the value of the formula without going over. If you have a scale check the weight of the powder charge dispensed by the disk combination.  
