28 Nosler, shot both 8133 and more recently Retumbo. Both gave similar velocities, no worries there. But the 8133 had given me high ES (25-60) over multiple loads, to the point I was questioning my loading practices. I decided to try Retumbo this week with 180 Hybrid & 175 A-frames. ES dropped to mid to low 'teens, and SD was single digits. Both 8133 & Retumbo were all shot with CCI-250 primers.