We have numerous threads on success in the field.
Now, what reasons / excuses do you have for shooting at and not harvesting a deer? Rifle, shotgun or archery.

A few years ago, I had a small buck at 50 yards broadside walking quickly and missed using a Remington 760 pump in .06. I dont believe it was " buck fever" as I've had plenty of success at that range. Later that season, I had a doe at 125 +- that I missed. WTF?
I took the gun to the range and hit a 1 inch group at 50.

I lost faith in the gun although it was not the gun.
In 40 years, I've had a few others as well to include:

Hit branches.
Deer moved as trigger was pressed.

How about you guys?