I built a sound reducing box, so I try and run my tumbler at capacity all the time, over night and while at work.
The box is constructed out of one of those 30 gallon buckets and lids (7 bucks) from Lowes and glued some chair cushion inserts (purchased for about 20 bucks) along the sides and lid to reduce the sound. (this is important for the wife, child and nearby neighbors). I cut a hole in the back of the bucket so that the cord can exit and not degrade sound muffling. Works pretty well. (This is determined by spousal complaints decreasing about 90% on the reloading subject! SUCCESS!!!)
I have a Cabelas tumbler can hold about 300 40S&W brass and approximately 100 223 brass.
"...and which is worst of all, continual fear and danger of violent death, and the life of man, solitary, poor, nasty, brutish, and short."-Thomas Hobbes, Leviathan
...What he meant to add was, "unless, of course, all responsible citizens are armed to the teeth."