People don't understand how much a broadhead changes arrow flight... especially big fixed blades.
That being said, I practice out to 1,000 yards with a rifle, and 100 yards with my bow. But would never shoot a critter at those distances. Adrenaline, environmental effects, and the critters play a huge role in effective shooting distances.
For a good rule of thumb, I say cut the distance you practice to in half for your live target range. Species dependent too. I've had whitetails drop into a spine shot at 25 yards with a bow when i was younger. Elk obviously aren't as jumpy as a whitetail.
Overconfidence creates problems.