I highly recommend the 7mm-08.

My wife has nearly zero recoil tolerance. She has only been hunting for 7 years and I load her a 140 grain Sierra Gameking at about 2600 fps and she shoots it extremely well due to the mild recoil of both rifle and load.

The 7mm has a very versatile range of useful hunting bullet weights from 120-175 grains that can all be utilized in a 7mm-08 of standard twist.