Actually, FBI statistics show that more people are killed with a 22 than any other caliber. Partly because it tumbles and largely because the lack of buck allows the shooter to stay on target and fire multiple rounds in a very short time. The ‘buckers’ have to be brought down and re-aimed after each shot.
Tumbles?
At range with 4H Shooting Sports with thousands of 22 rounds, every hit was a pure round hole.
The old “tumble” myth was attributed to .223 AR-15, which in boattail, reportedly could tumble after initial impact.