Based upon my prior experiences I have several questions and then several comments. You say that your "Hornady" wanders terribly, do you have a dedicated "electrical line conditioner" where the Hornady scale plugs into ? Is the area that you use the Hornady scale have overhead fluorescent lighting ??
I started shooting competitively over 20 years ago and found that both "dirty electricity" and fluorescent overhead lighting both made my RCBS ChargeMaster 1500 drift more often than not. I resolved that by using an "electric line conditioner" and switching to incandescent overhead lighting I took 90% of the drifting/ wandering out of the equation.
With regards to scales I had an AND FX-120 I which could weigh down to 2 hundredths of a grain (one granule of Varget powder). This by far is usually more than enough for the average competition shooter. I used that for a couple of years and then moved up to an AND HR-100A, this is an analytical balance and has a resolution of 1 /1000 of a grain. I can and do cut single granules of Varget in half in an attempt to get single digit extreme spreads and low standard deviation readings.
Pursuant to the above I would recommend first trying an "electric line conditioner" to clean up the power going to whatever scale and or scale/dispenser that you have or plan to use for reloading. Secondly I would look at the AND FX-120 I (scale only) as I think that it is wonderful for the money. It should be noted that with all the precautions that I take to perfect my reloading area I still get scale bounce / wandering every once in a while.
You need to step up to a Sartorius to get rid of the drift. The AX-120s just float more. The Sartorius is about 4X the cost. Just depends on what you are after.