Quote: Hornady Factory loads for the 416 Ruger match the original 416 Rigby ballistics and seriously beat the original 450/400 and 404 Jeffery rounds. All of which earned Sterling reputations !
And they had over pressure problems with that load. When reduced to 2250fps MV they had a good reliable product. Mind you, some say the original 416 Rigby loads may well have been around the 2200 to 2300 fps MV.