223 Brass Processing Mistake

Brass is best cut with high speed, with sharp tooling and not forcing the cut .....

This brass ....is the classic case of those symptoms ....

A small flat file as mentioned above and chuck the brass in a drill. Remove the lip and chamfer. A light touch and it will go quickly. If you used the debur tool on plated cases it will dull faster than if used on just brass cases. My RCBS/Wilson combo tool is not carbide and has chamfered many thousands of cases and is still sharp. I would try trimming a couple different cases of the same caliber and then inspect, then try chamfer first then deburr. Do they clean up OK? Did you find problems after trimming? Your tool may have come from the factory dull. That brass should be Ok to use as is the rest when trimmed. I think your trimmer cutter is the problem and is moving the brass as others have said. YMMV

After looking at the picture which was posted after my reply that is a rolled edge from using a very dull tool. Buy a new tool or just use the RCBS hand held tool. A few back and forth twists and that roll will be gone.

I had bunch of 223 brass once that I had trimmed and the good (or maybe not so good) old Lee deburring tool was hiding someplace under my bench. Unfortunately, I found it later. The next time I was in town, I stopped by the dollar store and picked up a sharpening stone. I chucked up the shell holder end of a lee trimmer in the cordless drill and spin the brass mouth against the stone. Worked great. Just move the stone up and down a little to help remove the burr. You can use either the fine or course side of the stone . I did it in such a fashion to keep any of the abrasive out of the case. I'll bet for a buck, it does a lot better job getting rid of the burr on the outside of the brass than it does for it's intended purpose of sharpening knives. Unless maybe you got the knife at the dollar store too .