i hunt out west because i live out here
i've shot prairie dogs, antelope, whitetails, mulies, and elk with a 4-12 leupold vx1
now my 25 06 winchester wears a nightforce 3-15 and i'll be using it to hunt big game with
i've got a swarovski 4-12 on a 204 ar i prairie dog hunt with and have made rock shots out to 500 yards
anyway i'm leaning on getting in the future the vx3 you're considering to put on a 243
with a 20 moa base and target turrets 1000 yard shots should be possible
at the local range i've shot a tweeked vx3 that john burns of greybull precision builds and made rock shots out to 800 yards with a 243
so to answer your question 14 power on the top end is enough power in my opinion for long western shots on big game
