I've been running chips for years, and have tumbled many thousands of casings ranging from .223, 6.5CM, .30 carbine, 30-06, 9mm, .45ACP. Here's a few things I've observed.
-I personally experienced many problems with pins, and had stow-away problems that took a lot of attention. On average, I'd have 1 stuck by bridging in a .223 bases and .30 cal mouths every 500 casings or so, and you had to pay attention. It is for this reason I switched to chips.
-I run a F.A.T. - I run it a lot.
-I decap my rifle-brass prior to tumble; so the chips can clean out the primer pockets. I don't worry about pre-decaping pistol brass, as air turn-over inside a pistol casing for normal evaporation through the flash-hole into the casing, is much better than it would be a rifle casing.
-My chemistry is tap water, ~ one .45 sized casing of Lemishine (give or take), one-two squirts of Blue Dawn, and sometimes 2 drops of TurtleWax (to simulate benefits of dry media-dust residue on surface).
-I do a water dump, and then 3 water fill/flushes and dumps, before dumping contents into the media separator.
-I have had no issues with chips sticking onto the surfaces or insides of casings - ever. I use an RCBS manual crank separator, and crank it back and forth about 60-120 seconds, and I do it "dry" (not flooded). In my experience, I don't have hanging chips ever inside of cases or out.
- I do this in batches, and will general run 4-5 full wet-media tumbles, because I get a lot of brass (go-go 3-gunners; they always dump their brass).
- Brass is then dumped on a towel on the ground, rubbed around a couple times, spread out, and let lay for a few days. Roll the pile around for a few seconds every day if able. I don't decap pistol brass, so water retention is much higher in the flash hole, and a minimum 2 weeks of drying time (the last week can just be in-container).
But I still don't trust that alone.
-All brass is then wet-lubed and resized.
-At this point I clean out the F.A.T. drum (this works best when it's had chance to dry, and the dry media then flows like water; then run my hand in there), so it has no residual media in it.
-I then wet-tumble again to wash off the lube, and also to rinse out any hiding media (there never is any).
-dry again
-I then re-trim all the brass (Giraud makes it so easy, this takes no time), as a final way for any hiding media to fall out (there never is any - but this did sometimes catch hiding pins, when I used pins). Also, Giraud is a good QC check in case any .223 cases snuck by without getting resized (they won't fit).
A few other tidbits
-back to pins: relying on the decapping pin to warn of a stuck bridged pin in the bottom of a casing, doesn't work. Even worse, it will bend the stuck pin, so it's no longer visible through the flash-hole.
-Chips do get all over the place. Some will end up running away and hitting the floor; so you'll be magneting up your floor from time to time (and/or vacuuming).
-Chips are not as easily picked up by the magnet as pins. They work fine, just be sure to get a half-decent magnet made for this purpose.
-Chips are much less massive than pins, and in my opinion, if you have a fugitive that stays stuck - it's likely to cause considerably less bore damage, than a pin would.
-I suspect chips do a better job getting into the primer pocket than pins, and so will clean out the nooks therein-better.
-Mixed shell casings with chips will take an experience. 9mm and .45 ACP casings will be a nightmare, as the chips will wedge them into each other. Occasionally a 9mm casing will stick over the mouth of a .223 casing, and .45/30-06 same thing. This is independent of media. Not terrible, but if you don't catch it, it will trap the two wedged casing full of wet media, and they won't dry - so you have to watch for that when running mixed casings.