How many or what % (however you want to state it) of deer that you've killed were the direct result
100% #3 and #4.
I'll be honest......I take mine sometimes....and I range objects around my stand. When a deer comes in......am I gonna sit here and tell you I take all that into consideration? Nope.
I end up 100% of the time....."guessing" the yardag.
Now how many deer do you feel you missed as a direct result if not using or having a rangefinder?
Zero.