Originally Posted by
dbblung
Thanks for the replies fellas. My friend is corcerned that if the Accubonds shoot that much lower at 100 yards than the Sirocco's do. He thinks they don't shoot as flat and there will be even more noticeable drop at longer ranges with the Accubonds. We do plan to take the chrono. out within the week and compare the velocities of the two. I think he is making more out of it than need be!
His change in point of impact is not a function of the velocity or the ballistic coefficient of the bullets. The barrel actually resonates slightly as the bullet travels toward the muzzle. The point of impact is a function of the barrels position at the point the bullet exits the muzzle.
My 30-06 shoots the 168 Nosler BT @ 3010fps one inch left of the bullseye. The200 grain accubonds at 2713 Fps are approx 5 inches high and the 180 accubonds at 2820 FPS are 8 inches high.
Just adjust your scope to the new point of impact and all is well.