Just my personal experience, but with One Shot I get a dented shoulder about every 8 cases through the die unless I pull the die before then and clean it. If I use less One Shot than that used, I'll start to have cases stick. So, I went back to Imperial. With Imperial, the cases size easier and I can run 40 cases+ through the die without denting any shoulders. Due to the fact that I have to clean the die every few cases, One Shot does not save me any time. Just my experience. Take it or leave it.