I'd go with the 6.5X55, a proven killer. As we all know here on the 'fire, the 270 Winchester is a gay cartridge that apparently just floats above the ground, wears pink slippers and, carries a pink purse.
Actually, pick a good bullet/load and either will work well.
You must have one of the limited edition Lilly Pultizer commemoratives 270s . Cool.
