My idea is to use it on roos, goats, pigs and also deer such as fallow, chital, perfect for hog deer.

Not to mention a European roebuck.

I wonder how over gunned it would be on rabbits, hares and foxes? No doubt way over gunned ...

An alternative calibre I have been looking at is the 5.6x52R but with its 70 gr bullet at 2800 fps the 6x70R with a 90 gr at 2400 fps is not a lot different anyway, and if the 6x70R could be loaded with a 70 gr (75% rule) the two may be almost identical.

The 5.6x52R (.22 Savage Hi-power) would still be over-gunned on the small stuff, but a little under-powered on the medium game.

Just mulling over a project.