RE: Rem. 700 or Browning A-Bolt
You can't go wrong with any of the 3 choices.
Every gun manufacturer has their lemons for whatever reasons.
Example: I had a friend that got a nice Weatherbee as a present from his Dad and that gun could not group better than 4" @ 100 yards.
Same friend traded it in, for a Winchester and 3" groups.
Now he has a Remington 7600 and it shots 1 1/2" groups.
FYI - Many of us tried his gun and with many diferent ammo selections with the same results.
Sometimes you just get a lemon, all the guns mentioned are good.
For a referance... I happen to hunt with either with a 700 mtn. (.270) rifle or BAR (.30-06).
However my best grouping gun is my muzzleloader @ 100 yards, strange hah?