I do it all the time. I mostly brew 20 gallons so I just force carb one and prime the other three kegs. I find that the amount of priming sugar is more than half. If you would normally use 3/4 cup sugar to bottle five gallons I would go about 1/2 cup. Yes I still measure priming sugar by the cup. Old habits are hard to break.
You will get some sediment just like in bottles but after letting it settle and dumping some of the first pour it will be fine.