I've heard that 1500 FPE is what you need to kill an elk.
I've heard that 2000 FPE is what you need to kill an elk.

But how about 2 Pound Seconds of Momentum? (Momentum is calculated by V*W/225,120, where V is velocity, and W is bullet weight.)

But that even is marginal for how effectively something will kill, isn't every number?

"Among the many misdeeds of the British rule in India, history will look upon the Act depriving a whole nation of Arms as the blackest"
-Gandhi

"The most foolish mistake we could make would be to allow the subject races to possess arms"
-Hitler