Question for ethical hunters

Added 2 new 32y additions to the gauntlet.. climbing squirrel and pesky flicker bird.
climbingsquirriandflickerbird.jpg

Ya there dead...lol (on irons)
 
there are different schools of thought when it comes to hunting accuracy. you could shoot groups and that gives you a theoretical probability of vital hit or you could take one shot and that gives you an actual probability. some guns don't do well with groups but that first shot is dead on. some people don't do well with groups. the 2 major factors in accuracy are the shooter and the ammo. as for size of group, I think it should be a little less than the vitals of the animal at the max distance you will shoot.
 
Accuracy IS always supreme. No matter the caliber, no matter the distance. It's up to the shooter to know his and his equipments limits. The question was about ethical kills. Your examples, while valid, only pertain to the 2% of idiots that would take those shots. A double lung shot is not anymore guaranteed with a .45 as with a .20. Too many variables come in to play at the squeeze of the trigger. It's seen with archery as deer duck the arrow and squirrels ducking the pellet at further distances. The longer the shot, the more time an animal has to react when it hears the sound before the projectile gets there. Suppressors do help with that, though. When you know the limits and stay within them, accuracy is ALWAYS supreme.
Then just use a laser pointer. It is far more accurate than any air rifle.