Ordered an RCBS crimp removal tool. It was litterally a chamfer tool with an added guard to prevent removal too much material.
Went dull in my first 30 cases. It was gouging more than cutting. Called sinclair, got a new one, it went horrendously in about a 100 cases. Wasn't impressed.
Called Sinclair back, they sent me three of them with detailed instructions on how to use, which was exactly what I was doing.
I've done about 800 cases so far and still going strong, the other two are still in the bag.
Almost got turned off after two duds, but with good customer service, I was quite happy to stick with it.