Bob's boattail hollow points in .22 and .25

In my experience, boattails require a slightly faster twist rate to stabilize them versus flat base bullets. With smaller calibers and lighter weights, the boattail doesn't offer much drag reduction. Mostly, the length of the boattail is what dictates how much faster the barrel's twist rate has to be. It will be interesting to see if a very accurate pellet with a bullet shape can be designed.