When hunting with a rifle, it the energy of the bullet that matters. With an arrow, it's all about blood loss. The 'power' matters, but only insofar as it is a factor in creating blood loss. Ideally, you want a through-and-through so the arrow is out of the animal's body and does not block blood flow. What's necessary wrt fps for an arrow to kill a moose? Search on Fred Bear and moose hunting. I doubt that any of his arrows were over 200 fps.

A high-speed arrow, say, high 200s fps or higher, is more forgiving with respect to judging distance, which is often a difficult skill to master. It's more forgiving because a fast arrow has less arc. If you think it's 50 yards and it's only 25, the slow arrow might arc out of the ideal kill zone and the fast arrow might still be in the zone.

When hunting with a rifle, it's the energy of the bullet that matters. With an arrow, it's all about blood loss. The 'power' matters, but only insofar as it is a factor in creating blood loss. Ideally, you want a through-and-through so the arrow is out of the animal's body and does not block blood flow. What's necessary wrt fps for an arrow to kill a moose? Search on Fred Bear and moose hunting. I doubt that any of his arrows were over 200 fps.

A high-speed arrow, say, high 200s fps or higher, is more forgiving with respect to judging distance, which is often a difficult skill to master. It's more forgiving because a fast arrow has less arc. If you think it's 50 yards and it's only 25, the slow arrow might arc out of the ideal kill zone and the fast arrow might still be in the zone.