scope adjustment: slow vs high speed ammo

[Heydude]

Hi everyone, I went out to shoot various speed .22lr ammo this past weekend from two bolt action rifles and found out that not only bullets shifted on vertical axis but also on horizontal axis when landed on target. So for example: comparing to subsonic, hyper speed ammo shot to the left and up (at 35-40 degrees).

Any theories or explanations why it shifts on horizontal axis? My rifle was not tilted and there was no wind.

 

[mmattockx]

Any theories or explanations why it shifts on horizontal axis? My rifle was not tilted and there was no wind.

When the barrel whips and vibrates during the shot, it does so in both planes, not just vertical.

Mark

 

[Juster]

I'd vote for barrel-related too. Maybe crown as well.

 

[T&G]

Combination of velocity and spin rate, plus the aforementioned harmonics. Perfectly normal.
Dr J