Depeding on your rifle, but my Marlin 336 shoots 170 gr bullets from either Win, Fed, or Rem more accurately than 150 gr bullets. No idea why. At normal 30-30 velocities, 170 gr bullet will tag a whitetail out to 150 yards with no problem. I'm talking 50% smallar MOA.
Not real sure how you can get "better" 30-30 ammo. There's not many options and they are all about the same, except for Leverlution. And I've never shot that.
