They're ok if your airgun shoots them accurately.
Even very powerful airguns are seriously anemic when compared to firearms. They poke little tiny holes, and if the holes aren't in exactly the right place, it doesn't matter what kind of pellet you use.
The Crow Magnums are good, most wadcutters are good, and the accurate range of both the wadcutters and the CMs tend to be the same. Domed pellets (round-headed) aren't quite as accurate as wadcutters (in general) but tend to be more accurate than any of the hollowpoints and also tend to be more accurate than either at longer ranges.