Some rifles just like certain bullets. I have two 30-06s, 22" same twist, same load. Both with shoot 1 MOA. But not with the same bullet. each shoots awfully the others bullet. Partion and interlock. Same grain and bullet type.
I hear some guys have load they like for all their rifles of that caliber, but that hasn't worked for me.
Lyman manual had an article, about if you bigger changes, to try a different bullet rather than a small grain changeof powder or another powder with a slightly different burn rate