The safest and bestest choice is the RCBS ChargeMaster or ChargeMaster Lite.
The Chargemaster scale will drift up to 0.3 grains over an hour or two session. I finish every load on a beam with the Omega trickler which has its own quirks, but is far better than a Chargemaster by itself.
https://dandyproductsllc.com/products/dandy-2-speed-electric-powder-trickler
