I use Hornady unique in the tub. RCBS lube gave me occasional dents but I was probably using too much and not cleaning my dies enough. With the unique, I just barely put any at all on the case. I sometimes ask myself how can it even be enough of it that I'm putting on the case because it's barely even noticeable that the case has any lube on it, but a little goes a long way compared to other case lubes I've used. I haven't experienced any dents with it. I'm a believer in it.