It sounds like Hornaday all the way. A number of years ago I purchased a Hornaday powder measure, I believe it was the "Pro". Although I used it many years , I don't feel it was as smooth operating as my present RCBS.
When I purchased it I found there was a ledge between the plastic reservoir and metal body. Whenever I wished to change powders or wanted to stop reloading there was powder on that ledge. A long handled stiff art brush took care of it. Finally, I took a Demidrill and ground it off. Have fun and good luck.