I have two Savage 99's that I hand load for. Last deer season I checked the sight in with a 150 grain Speer Hot Core Spitzer over 41 grains of Reloder 15 and fired a couple of rounds. It was shooting 5 inches low, it was a nice tight group. I checked a second Savage rifle that I brought and saw the same tight group 5 inch lower than both rifles shot the year before with a 150 grain Sierra Pro Hunter Spitzer also over 41 grains of Reloder 15. I only switched bullet manufacture since I was out of the Sierras. Cases, primers, and OAL from the previous year all the same. Has anyone else experieced the group impact change with different bullets of the same weight and shape? Any explanations as to why this occured?
