The Auto Disk Powder Measure comes with 4 disks. Each disk has 6 holes. That results in a possible 24 different charges for each different powder. The chart that accompanies the powder measure tells you how many grains of powder each different hole in the disks will deliver of each different powder.
Should you want a powder charge that is between what the given holes will deliver, we offer the Adjustable Charge Bar. This bar replaces the disk in the powder measure. It can be adjusted to give you any charge that falls between the smallest hole and the largest hole in the disks provided.
Always check your charge weights with a scale.
As far as charges varying from source to source, the light load is always safer.
