Bought my first pre'64 M/70 in 1975 and have owned dozens in the years since, I only just snug the forend screw and my 70's have always shot well without additional attention to said screw. Never torqued the action screws either, just tightened the front and rear and just snugged the middle screw. Never glassed nor pillar bedded or otherwise altered the factory inletting and my rifles always shot well even when swapping stocks to get one with a Monte Carlo or a pad.
