I have an RCBS automatic powder scale and dispenser. Tonight I tried loading for my 6.5 JDJ. I've never had any problems with this set up before. Tonight my load is 34 gr. of IMR4320. The unit dispenses 33.2 gr., trickles 2-3 more gr. and always stops short by 4-5 gr. I tried it with several different loads and it always stops 4-8 gr.shy of the load it is programmed for. Usually when it trickles the last few grains in the spout is more "forceful" than it is tonight. I don't hear the motor as strongly as usual.

Any sugesstions as to the cause? Is it time for a new unit? I had this one for a loonngg time.
Thanks,
Yosey