I purchased some federal ones a few years back, thinking they might be ok for very close up pigeons roosting in a barn. The brass case has a crimped end. I put a few through my Anschutz 1417 and fired them at an old plank of wood at a distance of about 10 feet, most of the shot failed to even penetrate the plank and bounced straight back, giving me zero confidence in their ability to dispatch much more than a mouse let alone a pigeon.
The empty case wouldn’t eject on pulling back the bolt either, it just stayed stuck in the chamber. I had to insert a cleaning rod down the end of the barrel and push it through to the chamber to get the case out. I gave the remaining ones away.
I have read that the CCI ones - with a see through plastic containing cup on the end might perform a better. I would definitely test them for function and performance before using them on anything alive though.