So today I went to reload the last of a box of bullets. I was using a Lee Safety Powder Scale to weigh my powder charges - one of these: http://leeprecision.com/powder-handl...-powder-scale/ I moved my scale so it's in a more convenient place, checked to make sure the sliding part is at exactly zero, locked it in place, zeroed the scale (moving the calibrating weight inside the beam until the scale shows precisely zero). I then moved the ball bearing from 0 to 10 and proceeded to weigh exactly 41 charges of 10,0 grains. After I was done, I moved the ball bearing back to 0 - and the bloody scale did not return to zero. Godsdamnit...
It wasn't terribly far from zero, so my reloads should still be usable. I did however spend time making sure my charges were quite precise. And now, apparently, they might not be. So, this annoys me. Also, it makes me question just how accurate are these scales in general, or if there is an issue with mine.