The simple answer is yes. Hit the right spot and it is dead.
The reality is that any error you make becomes much magnifyed by range and ones ability to read wind is a dark art not mastered by many.
Even an imperceptible breeze at 60 yds will have an influence and the gyroscopic effect and drag on the pellet will be taking hold making it more of a lottery.
Bottom line - the max range is based on the individuals ability to hit a 5 p peice repeatedly. That is the question you must ask of yourself
In a battle of wits I refuse to engage with an unarmed person.
To one shot one kill, you need to seek the S. Kill only comes from Skill