I have tried this and founds that it works as advertised. Due to our early Spring and an increasing membership at OGC, a lot of weekend shooters are coming out and most of these people don't reload. In the last couple of weeks, I have gone out to the range on a Monday or Tuesday, and have found a mind boggling amount of brass on the ground. Seeing as Obammy is still President, and the dear old GOP has fielded a stable of sick cats who do nothing but fight with each other rather than ripping Obammy a new one, the chances for replacing the anti-Semitic Kenyan Socialist and Muslim lover with somebody who is proud to be an American aren't looking to good. So I continue to pick brass for calibers I reload.
So I come back home with a big bunch of 9mm brass (mostly recently fired, but not all of it...) and wash it in the sink with MY collander (noobs: Using your wife's cooking stuff to wash shells is about a smart as loking down the barrel of your gun to see if it's loaded!!) to get all the sand and dirt and crud out of the cases. I then put the brass in a pot, cover it at least an inch deep with water, add two healthy squirts of lemon juice from one of the big bottles you get in the grocery store, and boil the cases for 5 - 10 minutes while occasinaly stirring the brass around with a SS slotted spoon. I then rinse the brass in water, and leave it in a pan in my oven which has a gas pilot light. When you come back the next morning, the brass is all dry.
The change in appearance is fairly spectacular, and I'm planning to do this from now on with all my range pick-ups before I even sort the stuff. The one area where this is superior to tumbling is in the inside of the case, and while the outside can be nice and shiny after tumbling, the cleaning of the inside of the case is not as good because you don't get much abrasive action from a few grams of walnut shells rolling around the inside of a 9mm case. With some of my tumbled cases, I have boiled them in water and lemon juice and have found a visible improvement on the inside of the case.
So here's a picture of this weekend's 9mm brass (had to make 2 trips to pick it all up!) and as you can see, it looks pretty much load-ready as is with no tumbling. On the inside of some cases you see they're completely clean, and some still have a little crud around the primer hole, but in general it's pretty good.
This method has several advantages, with the first being you get almost all of the crud out of your case as soon as you bring it home, so you're getting rid of the maximum amout of crud at the beginning of your reloading process. In addition, you may not have to spend as much time using your tumbler and getting it dirty with unwashed cases. (Dryer sheets help clean up dust and dirt in a tumbler like magic!)
So here's a couple of pictures of my range pickings, which have only been washed and boiled with water and lemon juice. Looks pretty good, doesn't it, including the inside of the cases...

