I do have this rifle and use Winchester brass, 180 grain Accubonds, 78g R22, Fed 215M primers, velocity is 3025fps. My cold bore shot from a clean barrel is usually 1" high compared to fouled barrel groups. Once the rifle is fouled, cold bore shot is in the group so no correction required. Really seems to vary from gun to gun. This is a great rifle I have used on several bull elk, last year shot a nice 5pt at 508 yds.