Are you using Corn Cob or Walnut Hull Media in your tumbler?
Not sure who you’re asking… but if it’s me… I use walnut. The lizard stuff from the pet store.
Be careful w/pet store sourced corn cob media. Some of it is pretty big and will plug up a .223 case very quickly. Digging it out sux. Ask me how I know…
Is what I use…I add a dolop of Flitz Metal Polish to the media every other use and media life doesn’t seem to be a real issue.
I have even heard of shooters drying out damp/clumped used media on newspaper spread out on a garage floor and gaining a few more uses out of it this way?
I use corn cob media with Midway polish or Turtle Wax. Once every couple cycles I will throw in pieces of a dryer sheet to collect the dust. It also makes the brass smell spring fresh! 
Years ago when I was a poor kid getting started in reloading I tried washing used corn cob media. It definitely brought it back to life but the mess of washing it and getting it to dry out was not worth the hassle.
One of the guys on 1911auto.org swears by white rice as a tumbling media. I am sure he is using it on 45ACP cases because I asked about using it on bottleneck cases and never got an answer.
I don’t see why it wouldn’t work on bottlenecked casings…Funny you mentioned this as I had thought about trying Cornmeal once upon a time. As it is finer and perhaps wouldn’t fill up flash holes…the one issue I couldn’t think of a solution to was the dust. I like the antistatic dryer sheet idea and may try it when the time comes to change out my media next.
I used to use rice, long ago. It worked fine but is expensive compared to buying bulk crushed wal-nut. And it tends to get stuck in primer pockets depending on what sort of rice you are using.
Chad
You can buy crushed walnut in 50lb bags for about $20 a bag, plus or minus (depending on your market) at sandblasting supply stores. 12-20 is the regular sized grit and 20-40 is the finer stuff. Walnut from a sandblasting supply store tends to have lest dust than the walnut from the pet store or feed store.
Supposedly feed stores are also a great place for Walnut
There’s a brown layer of dust on and around my tumbler right now!
Is this sandblasting walnut or feedstore/petstore walnut?
Just wondering
Chad
Lizard stuff.
OK, yeah, KATY or whatever brand tends to have a lot of dust. If you can find a sand blasting supply outfit in your area try them – less dust and usually about 35-50% the cost of the pet store stuff.
I might do that next time I need to resupply.
I found out what I was doing wrong.
I was not sizing all the way. I thought I was at the time. I was sitting not standing.
Started standing and saw that I could see brass at the bottom.
I unfotuently still have some of them primed so I will have to use those as a last resort. I have more primers. I saw this when I was preping some brass this spring. Basically if I have not primed the brass they are getting rezied. I only have 4-500 pieces of brass that are affected so that is good. I have more brass just need to get to reloading.
ffh
Problem was it was in my go no go gauge but it was kinda tight. I resized 10 other pieces of brass and it was good to go nice and loose and kinda sticky.
I use Small Based Dies for all my Semi-Auto Cartridges to eliminate the posibility of hangups due to expansion of the casings web.
I would also try some different powder. Accurate 2230 is THE best for 223/5.56 in my opinion, but it is scarce to find. If you do find it, buy all they will let you. Wideners reloading just got 8lb jugs in stock and it goes very quick 118.00 for 8lbs. You will get about 2000 + rounds a jug depending on your loads.
is that “Lizard stuff” walnut ? got a brand name ? and/or a place to buy it ? are you in the Phoenix area ?