Sinclair should have them but WHY?
I used to actually see burrs inside the case on brass many long years ago and actually took the time to remove it on many of them but never was able to see a difference in accuracy from doing it. Lately I've not seen a case with a burr inside and quite honestly after so many times looking and seeing none I stopped looking. I've not done that (in my opinion useless operation) in at least ten or twelve years maybe longer.