I have a RCBS "5-10" reloading scale that has developed a problem: it won't always return to the same zero. I can "zero" the pointer with all the slider weights set to "0", then blow gently on the pan to make it move a little, then watch as it settles down either above, or below, the zero mark by as much as 3/10 grain. This inconsistency is NOT acceptable, in my opinion. It means my loaded ammo could have a variation up to 6/10 grain from one shot to another.
Should I send it to RCBS for repair, or just junk it?
If I buy a new scale, what make/model do you prefer, and why? Would it be better to adjust the scale with a calibrated weight, instead of the "zeroing" method? (like set the scale to 50 grs, then put a 50gr calibrated-standard weight in the pan, and adjust the pointer to zero...) What do you think?