Matt, so what you're saying is that you WOULD take at shot at 45 yards? White tail, moose or elephant. You would take a shot over 40 yards. If the deer were on drugs standing in the middle of a power line, couldn't hear, smell or see you. Your would take that shot?
Sniper.......
Given that I am sure of the yardages? It would still depend upon a bunch of things, wind, angles etc. On an animal like an Elk or Moose under good conditions? 40 yards? 45 yards? (drugged and just standing there?

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Yes I would take that shot all day everyday on a relaxed animal, probably further than 45 yards. I have that much confidence in my ability, equipment and arrow capability. I practice out to 80-90 yards, and shoot ALOT. Not a shot I would take for granted for sure, but well within my ability. Is that for everyone? [:-]
Absolutley not.
A smaller animal like a deer? I have passed the dopey 45 yard deer countless times for the chance that his dopey butt will wander a little closer.
But under ideal conditions, as in a bedded animal at an exact known yardage around 40? Absolutely.
Have I ever had that opportunity? Nope........but I'm ready for it.
But like was mentioned we're talking about a very rare occurance in the true hunting world.......perfect shooting conditions, perfect animal position, etc etc. Reality most times dictates what can and cannot be done, and most times the "cannot" wins.
Not sure about the Elephant thing........