Is for hunting or punching paper ? 6x is plenty of magnification for hunting out as far as I can make reliable hits ie 200m. However I feel that extra magnification is nice on targets. Hunting, I like to see the animal and be able to line up the leg/ pick one third of the body etc. If you zoom too much, all you see is fur and if you pull the trigger then it is a crapshoot where you hit. Another common problem I have seen is hunters playing with their scopes because the magnification is set too high and they can't pick up the animal. You want to get on the sticks find your aim and squeeze the trigger. Field of view and long eye relief are more important than zoomies.
My advice, take a colored paper plate to the range along with a 3ft square box. See how that looks at different distances. If you can see the whole box and hit the plate, you are good to go on impala at that distance and zoom. I am happy with 4x zoom to around 100m and have never gone over 8 on my 3006 while hunting. At the range from field positions(resting on my pack or off a tree or tripod) I usually don't use 12 x or higher because I see wobbles and end up chasing the crosshairs all over the place. Maybe other guys are super steady. So go try it for yourself and then decide.