i like winchester brass and winchester wlrm primers for most of my shooting. 56 grains of h4350 or 60 grains of rl19 works really well with a 150 berger out of my weatherby vanguard. ive also tried RWS and norma brass, not much of a difference from my 270 wsm but i did find they could handle alot stronger charges in my 6.5/270wsm. the nolser accubonds are great bullets for most whitetail hunting but i couldnt get them to shoot as well as the 150 berger that i settle on. if i were you id stay away from the gmx, they dont expand very well at longer ranges. even on hornady's website they show what the expanded bullets look like, they just barely open at 2000 fps.