Re: .270 bullet
I'm shooting a 270 WSM, so a few hundred more FPS. I was shooting 130 gr Barnes TSX and 135 gr SMK's out of the .270 Winny I had before. The TSX worked good on elk, but shots were relatively close. As royinidaho said, 400 yards is probably a good limit as they run out of steam by then. The 135 SMK's have a BC of .488. They shot pretty good out to 750, but were becoming pretty wind sensitive by then. Currently I'm shooting Berger 140 VLD's at about 3200 fps. They have the same .488 BC, and are getting blown around pretty good at 800, but with steady wind conditions they have shot well at 1077 yards.
I tried the 165 gr Matrix in a 10 twist barrel, but they simply would not stabilize. My usually .5 MOA rifle was shooting 4 MOA.
My experiences, FWIW