RE: Remington 7400 in .308 Problem
Stat, what you do need to be aware of more than jamming, (which misinformation I think has gotten out of hand), is POI changes. You can take the foreend screw and tighten down real tight an be zero'd at 100 yards. Then Loosen it and POI can change up to 6 to 8". I noticed this isn't the case for all 7400 and 742. But some put unneeded pressure on the barrels. It also has alot to do with the forearm dimenisions.
What I do is before hunting season, is put loktight blue on the forearm screw and tighten pretty tight. I sight the 270win 7400 gun in. My shoots 1.5MOA with 55gr of 4350 and 210 primer and 130gr gameking. And don't take apart or clean until after hunting season.