G'Day Fella's,

Ripp, I would go with a .270Win or 7x57.
Just be aware, that you should never dry fire an M10 (without a Snap Cap), as the firing pins tend to break. Not sure if this has been addressed, but...

Mind you, after handling the Martin Hagn falling block, single shots, I'm a bit smitten!

Doh!
Homer