284 long action 1:8 twist brux. I get the 177 hammer hunters at 2850fps, 180 berger hybrids at 2805fps, 175 ELDX at 2800fps, 168 barnes LRX at 2930fps. All using H4831sc or R23. All tested accurate loads with no pressure signs. What brass are you going to use? I can only use winchester brass or Hornady. The neck section of the reamer needs to be a touch bigger if you want to use norma brass. They have very thick necks campaired to winchester.