Bullet proof means what to you ? To me it means something that with take rough treatment and still work. I've never had a Leupold shift zero from the bad falls where I have literally pitched m rifle away from me and down on the rocks. That includes an M8 4X, an FXII 4X, a VariX II, 3-9 Compact, an FX3 6X42, and a 1.5-4X Scout Scope.
As far as 300 yds. shots, that can be done with iron sights in good light. Any of the above can easily do that.
BTW, considering Phil Shoemaker's experience with the Leuold 2.5X Ultralight, 6.5 ozs., I've seriously considered buying one. I haven't simply because I have more than enough good, tough scopes. E