What is the best 300 win mag factory ammo? I have been using hornady 180gr sst superformance & LOVED THEM so far. Easily subMOA accuracy out of the rem 770 (I know it's a relatively bad gun). That being said it makes the accuracy from that ammo even more astonishing. I just bought 2 boxes of 180gr Winchester silver tip to try out. They're a little cheaper, but I've heard good things. I may try federal bonded ballistic tip, but they're expensive & I shoot often. Any suggestions? I need high performance ammo that's cost effective.