Thread: RCBS 505 issues

Seems my scales aren't holding zero value.
I set them to zero, gently move the slides to set correct weight. Weigh a charge of 44g, I then move everything back to zero the balance beam and notice the scales need adjusting. I adjust the scales and re weigh the 44g charge(tipped out of case) and the charge weight is incorrect.
Any idea on how to fix this if it is at all possible. I must have done something to my scales, I'm pretty careful with my equipment but something has happened. I only decided to check my scales as the last rounds I made were shooting all over the show. Thankfully I only made 30.