Try 20/40 grit corn cob media (not pet bedding either get media) and treat with a little nufinish. With the corn cob an hour or two at the most produces some really high polished brass. Also fill your tumbler with brass and media, no matter which media you use filling the tumbler completely will...
I wish I still had the money I spent on mine although it is OK I would have saved another two hundred or so and bought a hornady LNL.
They will load ammo just be prepared to hand prime you will understand after you load and prime on the press a bit
I only have 2.6 acres and shoot often on my place. I only have about a fifty yard range but it works for me. I do have the advantage of a nice natural hillside to absorb any fliers that might get past my bullet trap.
Personaly I would prefer the heavier round but either choice would probably be effective in the event you are required to use it.
It is un forunate that in Indiana we can not hunt anthing larger than a squirrel with the .45 acp. it would be nice to try our carry rounds in a real life situation...