If you believe in the axiom; one shot, one kill.
What does the length of the action of the rifle have to do with the killing power of the bullet when it gets to the animal?
In terms of speed, what do you think the difference is in ranking the next round ?
Not so much speed as it is not short stroking the longer cartridge in a high adrenaline and an excited condition.
In terms of weight, what do you think the difference is in a production rifle?
6-8 ounces. Not enough to matter.