I bought some barnes expander mz bullets to shoot out of my knight disc rifle. I am using 3 50 gr pellets and am not getting very good groups. After locating the bullet, I am finding that I am getting good expansion. They seem to be good hunting bullets but I am not happy with the accuracy. I was thinking of looking for a different bullet to use to obtain better accuracy. Any opinions from you guys would be appreciated. Thanks, Carpmaster.