Sure have. I originally bought a RCBS chargmaster and it worked, but with large powders like Varget it would over throw about half the time. Its like when it would get down to the last few tenths the thing would spin too much and drop more powder than it needed.
Now onto the Hornady. Little story about how I got it first. I went and competed in my first 1000 yd BR comp last month. Ended up winning factory gun class!!! Anyway the Hornady guys were all there (awsome people by the way!) and they had some door prizes they were giving away. I ended up winning a Hornady Lock n load charge.
Now onto how it works. After being agrivated over the $325 RCBS unit, I imediately took the hornady down to my reloading room filled it with Varget and punched in 30.0 and hit dispense. 30.0 exactly, tried again 30.0 exactly!!! I loaded up 30 rounds of varying amounts of H4895 to try in by 6BR this weekend only had 2 over throws. I calibrated the scale and tested a couple times agaist my ballance beam scales and it seems right on to me.
SO I'd say give one a try and see how you like it! I love mine so far.