ORIGINAL: Ideaman
Try both, bonded bullets are a little tougher to match with a rifle. Good chance your gun might not shoot either very well. Toss up of which one to try first.
Find a friend that has a 270, buy up 4 or 5 brands of ammo. Split up the ammoand try them all. It sucks to spend $40 on a box of ammo that after 3 shots you know won't work in your gun, at least you can save a little money if you split with a friend.
Find a friend who has a .270, and
who LOADS HIS OWN AMMO FOR IT!! Then recruit his assistance in working up a decent load for yours.