I've been using it in my Black Diamond XR for 6 years now and it works for me. I can easily shoot 3-4 times without having any problems getting the sabot down the barrel and seating on the charge (no I don't put it on the plastic around the sabot) and there is no decrease in accuracy. I'm not sure if this is due to the bore butter or not, but I'm not going to try and fix something that isn't broken!