Bart says:
square up their faces with the barrel tenon axis
That's critical for accuracy in any rifle. You'd be surprised how much difference that little trick will make.
As to the Model 70s, I have several, I'm a huge Model 70 fan, and its my opinion the FN Model 70s are the best of the lot, bar none.
Lets talk about "walking". Walking does occur and it occurs more in Featherweights then others, but being old and wimpy I like Featherweights for hunting. So when I got my FN Model 70 it was in Featherweight because it was going to be a hunting rifle.
When I shoot my other Featherweights, I found they do start walking as they get warm. I can normally get 5 rounds before it gets too bad. Which really isn't a problem in a hunting rifle, in shooting at game and you need more then 5 rounds you have more problems then fixing "walking" will cure.
Having said that, I expected the same from the FN, it didn't happen. FN Model 70 Featherweight barrels are free floated (at the factory) and don't make contact with the stock when they get hot.
This doesn't affect my hunting because I doubt I'll get 3 rounds out before the critter is hit, or left the country. But I do like just plain shooting sessions and found out I can shoot a lot longer with the FN Model 70.
And yes its accurate, smooth (smoothest out of the box bolt gun I ever had). The FN trigger is easy to adjust (Though I never felt the need to adjust mine, It came set at 3.5 lbs which works for me.
Also the FNs are pleasant to look at.