All of a sudden my Lyman Pro-500 balance has gone whacky! I make a regular habbit of checking the zero before I begin reloading. And for 6 years I never had a problem with my Lyman powder scale.
Just last evening I couldn't get it to zero. It's like the gold pan is 1/2 grain light now. I inspected the bar and could find no debris sticking to it. And the 1/2 grain light is with the leveling wheel turned to its lowest point, or however you describe it. Basically I took into account that the wheel can be turned to bring it onto zero - not possible.
The agate notches are clean. The bearings on the bar look good and sharp.
I'm perplexed.