I have used both for 223 and other calibers. Both units tend to leak. Both units throw fairly consistently. I have 4 Auto Disks with one set up for double disks and two Auto drums. The smaller grained powders tend to leak more than the bulkier flake powders. I also have a Lymans #55 that never leaks and throws an accurate load time after time. My two cents is since both Lee units are inexpensive try the Auto Drum.