Land_Owner - You certainly have a right to your views. And I respect that. Your Pact unit must be very slow compared to a RCBS Chargemaster unit. I would not consider a Chargemaster as fast as a set-up powder thrower by any means. However, if you factor in the set up time; the time to adjust the thrower to reliably throw the exact weight each time, I found the Chargemaster to be quicker to load say 50 rounds than to do all the adjusting and then throwing the powder. If you are going to load 500 cases, then the time spent setting up a thrower becomes a non factor and the thrower becomes much quicker than an electronic one. If I had one case I loaded for and could set the thrower to that weight, it would be a no brainer that the thrower would be the way to go - no adjusting. I use mine for many different cases from 38 Special (2.6 grains of Bullseye) to 444 Marlin (45 grains of RL-7). It is very easy to jump from one to another. As far as throwing different weights of powders, the adjusting of the powder weight is the only thing you have to do. Once you punch in the weight, it will dispense powder immediately to the correct weight. You adjust a beam scale, then you still have to go through the hassle of adjusting the powder thrower, or dump in a light charge of powder, wait for the scale to settle, then trickle in powder until you get up to weight. When I was starting out, I loaded for a 222 Remington. One of the best powders for it was considered IMR 4198. Try as I might, IMR 4198 just would not dispense reliably with my powder thrower. I had to use a ball powder to dispense properly. Eventually, I got a mild load of BL-C2 to work well, but it was a real time consumer.
There is one other factor...I want to think about what I am doing as I reload. Some times; not always I get a small pause between loads. I use this time to organize cases, get more bullets out of the box etc. - mostly, I use this time to think about the process and what I am doing exactly. I have caught mistakes, before they are a problem this way. Getting all wrapped up in the process and going as fast as you can, is not always the smartest thing to do. I suppose if you really think that reloading is a chore, then fast is best. Personally I enjoy the reloading process and am very picky about it. I clean cases every time they are loaded, uniform primer pockets, clean primer pockets every time they are loaded, I use a single stage press, fuss over bullet run out, etc.
You can use a powder thrower, that is your prerogative. As for me, been there, did that; I will continue to use my electronic dispenser and not look back.
Yes, I use my electronic powder dispenser for revolver cases - 38 Special, 357 Mag, 357 Maximum, 44 Mag. No issues other than those stated above. I can go from 2.6 grains of Bullseye to 24 grains of H110 in a matter of a couple minutes. It takes that longest time to empty one powder and refill to another, but that is still only a couple of minutes. If you are going to load for one case and use the same load, like for cowboy action loads, stick with a thrower. If you are going to load for many different cases and loads, or doing a lot of experimenting, get an electronic dispenser. I am not familiar with any other than the RCBS Chargemaster, but it works well and has a good warranty.
Good Luck and Good Shooting