I have actually two different RCBS dies that give the same problem. Both scratch the outside of the necks of brass during resizing. One set is a SB for .223 and the other is a FL die for .308.

Anyone had this problem? I believe they are working the brass tooooooo much and want to fix it.

Cases are cleaned before resizing, lube is Imperial on outside of case body and a Q-Tip swipe of Imperial on the inside of the case neck. Inspection of the dies reveals no obvious signs to why this is occuring.

Should I just chuck these dies or what???

Sparks
You have a very common problem.
Probably some dirt got into the die and caused the problem.
If it's not too deep,you can polish out the blemish on the die.
There has to be something inside the die to cause this.If you cannot see it,it probably can be polished out.
cut a small strip of fine abrasive paper/cloth,and put it into a wooden peg.I cut a slit in he end of the peg to accept the abrasive.I put this assembly in my drill press and hold the die in a bench vise.
Start with very fine grit,because you will enlarge the diameter of the die with coarser grit.
Good luck
Frank

Krag hit it. Probably a chunk of something in the die. With all that sizing wax chances are pretty good you inadvertantly got a piece of something in there. Dissassemble the die completely and hose it down with some carb cleaner. Just be careful not to get the over-spray on anything plastic or the wife's flowerbed. :p

RJ

Make sure that the vent hole in the die is clear, too, while you're at it. It may be under the locking ring.

RCBS is very cool about correcting trouble like this. Send them in for inspection and polish. All will be good when you get them back.

Cheezywan

I'd try cleaning it out OR send the die back to the mfgr. I sent my Bonanza Benchrest .308 die back to Forster, they charged me $8 to polish the die. Got it back in 2 weeks. For $8, it seems silly to spend my time to DYI.

I had the same problems with a non carbide pistol die. I tried to polish it out but could not correct the problem. I contacted RCBS to see how much they would charge to polish the die for me. They said to send it to them with $5 to cover return postage and they would either polish the die or replace it. So, for postage both ways, I ended up with a brand new die. I love RCBS and never buy any other brand of reloading equipment. They have come through for me three times with free or very inexpensive services.
Moosie

My experience with RCBS was one-way postage only. I sent +/- 6 sizing dies all at once. They came back new or as new at no charge. It was a very "positive" experience from my point of view!

Cheezywan

Given the surface hardness of dies, I really doubt anything is "stuck" in there. What does happen is tiny bits of gritty material get imbedded in the brass and that scratches the die surface. It can be "polished" out quite easily and without die damage IF it's done right.

I use a slightly undersize wood dowel, split an inch or so to hold a slip of fine carborundum paper in a drill motor to do this. Using a black sandpaper grit of 600 to 1200 (from Walmart's auto paint section) and a few drops of light oil for a lap, running the paper in and out of the die while holding it concentric with the body until the die surface is restored. That's what the die makers will do if you send it back to them. It takes maybe 4-6 minutes depending on the grit used, the speed of your drill and how snug your improvised lap fits.

It's easier to keep a die "clean" than it is to clean it up later. That means use a good lube and keep the cases clean. And, contarary to some suggestions, do lube the case necks a little, it will prevent galling tiny bits of dry brass to the hard, dry surfaces of a die and making exactly the kind of fine scratches you describe.