RE: 270 Winchester Accuracy?
Well, if you talk to anyone out west or outfitters they usually recommend .270, 7mm mag, as a minimum starting point,
which are some of the most popular cartridges for big game and flat shooting accuracy.
I shoot a .270 for longer range / open shooting (scoped rifle) and would use this caliber for deer, carribou and even elk.
I also use a .30-06 as my open sight / brush gun and would most likely use this for bear, elk, moose (heavier bullet's).
The 7mm mag is a good bridge between the two calibers I hunt with, if you only want one gun.
A little heavier bullets are available with some extra gun powder for knock down power.
However, a good placed shot will take down any of the mentioned game animals easily.
If you go with the .270, I have found the best bullet weight to be .130 grains for accuracy.
Most of the people I know agree with this weight and have also read a few articles with this disclaimer.