I'm not sure if you're looking at the scale only, or the combo... In any case, I had the combo for a bit but returned it. I haven't gotten into rifle yet (although I plan to), and I am convinced this scale is not made for pistol use. My first example wouldn't hold a zero to save its life; even leaving it on all night would find the scale still drifting around. Must have been damaged in shipping, so I sent it back and got another. The second one zero'd right away (as the instructions indicate it should). So I set off to load 50 9mm's with a pretty hot charge, which I wanted to be precise. I used AA#5, a very easy metering powder.
Dropping a charge took anywhere from 2 seconds to 3 minutes. Often it would seemingly never finish getting that last grain... So I'd have to tap the "trickler" or use a brush to brush out a few balls of powder to get it to finish. About 1 or 2 out of 10 came out quickly and on the money. The other 8 I'd be waiting and fiddling.
Might as well use a powder trickler and weigh them myself.
Before I boxed that one and sent it back, I tested the scale out (just using it as a scale). I am not happy with my Hornady digital scale (which is why I went looking and found the RCBS, anyway) and I wanted something with better precision and a more stable zero setting. The ChargeMaster scale definitely did those things, and I enjoyed it a lot. It seemed to be very stable, especially if I left it on for a few minutes before using it.
I returned the ChargeMaster combo and figured I should buy the ChargeMaster scale only (this may be what you're looking at, too). But I'm wondering; what's the benefit of the ChargeMaster scale over the LoadMaster? The LoadMaster is about $50 cheaper and looks basically the same...
So I still haven't bought my new scale