FWIW, I use the https://dramworx.com powder and shot bottles on all 4 of my Mec reloaders and also the Dillon Powder Alarm Hopper, Medium Size on my Dillon 550B. They are well worth the money in my opinion. I also use the Mec bottle support with the Mec reloaders. You have to lower the bottle support to fit the Dramworx bottles, but it is easily done by drilling a new screw hole. Dramworx support is great also. Shoot Straight. Driftwood Dan