All I know, is that my wife & I shoot an amazing amount of 9mm, 38 Special, .223, & 45 ACPs. A bit less with other calibers. I do enjoy slow production loads on the single, where I do a lot of experimentation. But, it's always on my mind, just how many completed cartridges are being produced with every pull, on my prized Dillon 650. Just gotta love it!!!