75 to 80 gr of 777 is plenty for me. Anything more and accuracy drops in my set-up. Even though my rifle is rated for up to 150 gr, I have no desire to shoot that heavy a load. I don't plan to shoot at anything over 100 yards to begin with. Your choice of projectile will determine if a high charge will yield positive results. State what projectile you shoot and many here will recommend a good starting point for all around performance.