I have a BAR .270win, and am strongly looking to buy a .270wsm mtn/sheep rifle in the near future...
so IMO that BAR is a heavy .270win, vs. a lightweight 270wsm...I would tend to want to buy a new cartridge than double up on something, though I suppose in some cases it makes sense...
You can always sell one or the other I figure...course my bar270 shoots great so i probably wouldnt be able to part ways with it simply for having a .270wsm as well,