I went ahead and took some denatured alcohol and a q tip, cleaned up the pivot points on the scale. The q tip showed no residue build up at all. I looked the scale over closely for wear and saw none. Next check was to weigh some different bullets. Sierra .277 150gr. weighed exactly that, Sierra .284 160gr. weighed 160.1, Hornady 50gr. .223 VMax weighed 49.9, and a Nosler Ballistic tip 50gr. .223 weighed exact. My conclusion here is that my scale still has plenty of life left in it and that I need to be more thorough in my reloading techniques. Thanks for the input!