ITs time to add another caliber to my collection. I have a 375 H&H, 300 Win Mag and 3006. I mainly hunt moose and deer. Im looking for a flat shooting round that has a lighter recoil so my wife can do some target shooting but also take deer hunting. Im thinking 280 Rem, 6.5x55 or 257 Weatherby or one of the other 7 mm. Any suggestions or input greatly appreciated