I use a .270 Winchester or a 6,5x57 of my own.
Depending of the territory I have also a 6,5-284 (very good mountain cartridge) and a 6XC on a light stainless and Kevlar technical rifle.
I'm not too sensitive to the caliber choice and I have always preferred a light medium cartridge in a very accurate and well-balanced rifle than any magnum.
Usually shots are taken between 200 and 400 meters.
Thanks for viewing.

DORLEAC
www.dorleac-dorleac.com