6mm PPC is a great calibre - possibly the most accurate calibre there is out to about 300 yards. Most short range benchrest rifles are chambered in this calibre.
It makes a great vermin and fox round, but it does have issues for deer stalking. The maximum bullet weight is usually limited by the twist rate which is typically 1:12 or 1:14. This effectively limits the maximum bullet weight to about 70 grain.
This weight limit immediately makes it illegal for anything but Roe in Scotland and the energy available makes it unsuitable for anything but Muntjac and Chinese Water deer in England.
Here is a good article on the calibre - http://www.6mmbr.com/6PPC.html
The Sako 75 is a very fine rifle though