Trying to decide on a scope for a new Cooper 270 Win. I am a big fan of Swarovski Scopes but would consider a Zeiss or Leupold also. I am trying to decide on power and reticle. I am looking at the Z3 4-12X50 and Z5 3.5-18X44, can't decide on BRH vs BT (ballistic reticle vs turret). I doubt I'd be shooting at an animal over 400yds, but I do like practicing at 500-600yds. Thoughts, suggestions?