Any gunsmith familiar with a Winchester 70 trigger can adjust it. It's super easy. I adjust mine (got it down to about 3# from 3.5# from factory - and no glue on it either, but it's a 2010 A5m standard).
No break in required and FN knows how to make some fricken good barrels and how to chrome line them. My gun is a consistent sub 1/4 moa gun (0.22" factory target) as are several others I've seen. Best factory test target I've seen is a 0.13" group! Not many factory rifles capable of that, let alone ones that aren't chrome lined.