I loaded .357 magnum with one and got about 200 rounds per hour average from it ... no complaints. However, as someone noted, it is a three die press. I got a Lee Factory Crimp die and for a while was hand crimping with the Lee Hand Press after loading the .357 magnums. This got old fast and I bought a Lee Classic Turret, 4 die press. This solved the .357 magnum and .44 magnum loading question for me ... this press works great.
I then decided to load .3o carbine with the Pro1000. So far I have not loaded any. I use WW296 and found that when the Pro1000 does not seat a primer, that powder winds up everywehere, but in the case. The biggest gripe I have with the Pro1000 is that when, and it will, something goes wrong, it takes a bunch of time and steps to ameliorate the problem. This involves undoing the powder feed lever chain, removing the turret, undoing the ram, removing the shell carrier/shell slide, Z bar and then resetting up, after cleaning, and re-setting indexing.
If nothing else, a glitch in the operation takes time, a bunch, to correct, where the Pro100 is concerned. I have not found this to be the case with the Classic Turret. I'll keep fooling with the Pro1000, for when it is on, it works just fine and puts out the ammunition, for me.