Yesterday I ended up with some .223 brass that was pried with Ginex small rifle primers that still had too much lube on it- (lanolin/alcohol) so I decided to try tumbling it for an hour in fine ground walnut shells. AS I noted previously, I did this before but with a very small sample.
Of course I forgot about it until this morning at 5am when I woke up and had a feeling I had forgotten something
On the plus side, the brass was VERY shiny. I duped the brass into my Dillon separator and gave it some really good spins then took 3 cases and chambered them to see if the primers would pop. They did, so I dumped them into the brass collator and within an hour I had over 1000 rounds of shiny loaded .223 ammo.
Today at the range I went through about 350 or so rounds of it in Tavor X95, WS-MCR, WK-180 and Ruger American bolt actions. They all went BANG!
So would I use this technique for ammo I was going to compete with, go hunt with or to work up a load with? Nope, no way. But this stuff didn't need to be super precise or reliable but it turned out to function fine and hit the steel at 100 meters. 4", 6", 8" etc targets were all good to hit. I didn't measure group size.