Got bored so decided to some penetration test 29gr 22cb long vs .17 cal 8.5gr going 900fps+ and the 22 cb long going 710fps. The test was done at 30 yds shot at dry wall here r the result.
Ya my cb long was a lot quieter then the air rifle ,but the17cal pellet transfer energy fast though it did leave a dimple on the 4drywall though and that was with hollow point.