I at the Present, have a Brass, Knight Powder Measurer, along with a Sliding Stem, on the Powder Metering Unit, that is Calibrated in 10 Grains by Volume Marks. Ive Checked what the Knight System is Throwing, by using The Clear Thompson Center Powder Measuring Device, and the Knight is Off by 10 Grains, Consistently. What do you Consider the Most Accurate Measurer for Measuring by Volume. Name and Company Please. Thank's!