I don't know the pretext for the question. But whatever the maximum range for a particular projectile should be considered it's maximum lethality. Just from a scientific viewpoint, even if the bullet's forward momentum is halted the bullet's downward force would be enough to penetrate uncovered flesh. Bullets are deadly far beyond there point of effective range. Again, I don't understand the pretext for the question but one thing should always be in our minds. What could this bullet hit if I miss my mark. You should always be aware of where your bullet could potentially land. I would consider a bullet's maximum range it's maximum point of lethality, where humans are concerned. That can be determined by simply plugging all the variables into a ballistics calculator.
I read an article once about a guy standing in his yard and he started hearing something hitting his roof. He went out and found several projectiles lying on the ground. He could hear shooting in the distance so he went to investigate. He found a bunch of guys shooting a 338 at a cardboard target located at the foot of a hill about 200 yards away but located in front of a pond about 50 ft behind the target. The bullets were ricocheting off the pond and landing in his yard in a residential area 2 miles away. Maximum effective range is a completely different context than maximum lethality. All guns should be considered lethal to their maximum range but should only be used for game or tactical situations to the point at which the bullet's impact of the designated target can be reasonably predicted with little room for error. A subsonic 9mm fired from a 4in pistol can accurately be fired at a man sized target at a hundred yards and it is lethal but most of us would not chose it as our first choice for that purpose. Again, what is the pretext for the question???
Make sure you know what you are shooting at, have the appropriate tool to do it and be safe. JMT