Stevie - I am wondering who the 'expert' was that told you you needed premium bullets for the 270 WSM. That was inaccurate advice. I'd try the 130 gr Sierras out of your rifle and see how they shoot.
Please don't discount the Nosler BT on one deer. I've use them exclusively in my 270 and have dropped countless deer with them form point blank to way out there. From what I've 'heard' the earlier BTs had a thinner jacket than the ones now. Don't know if that is true.
I use the Accubond in my 325 and they are plenty accurate. But then again, you getting into the premium bullet again.