If all the rounds are grouped tightly. Change your scope real subtle like and watch em all go in the bullseye.
Hehe, I dont mean to rag on you. Just pokin a little fun thats all. What the previous responses all point out correctly is the simple fact that different bullets shoot differently.
Find a load that groups tight, adjust the sights to where you want them to hit (ex. I typically sight in my 06 about 2 to 2.5 inches high of bullseye at 100 yards). AND LET EM RIP.