I'm not much of one cartridge for woods and another for open area's...  Why not just carry a gun chambered with a cartridge that will do it all???
 
  I like my 8x57jrs as it's one of the "do it all" cartridges, and in a break open gun i want a "rimmed" cartridges, as my jrs is.  I taken everything from moose and bear on down to smaller animals with it loaded with 200NP's at 2,550fps and it has worked VERY good on everything i've shot with it.
 
  I had a DR in 375 Win., to me it's not a do it all cartridge, so it's gone...  I guess for the lower 48, i could live with the 7x65R just fine...  But i'm not unhappy with my jrs at all.
 
  DM