Mykey...

i did own a 270win. but for a short time. i used 130gr. federal classic HI-shok's. felt good when shot and got 4" groups with iron sights at 100yds.
the only thing i did not like about it was that if i decided to go bear hunting i would want a bigger caliber to make sure the job was done right.
but for open fields and such i like the flatter shooting of the 270win. bullet selection dosen't mean a big thing to me. as long as the selection they have have decent groups out of my guns. also the 140's did not group out of any ammo i bought. but the 150's were just as good.

i thin you will have to debate on what you like better for your situations. GOOD LUCK !!!