Bob,
".........That is a little light unless it's maybe in a gas ram. ....."
Maybe not even then.
I've tried them in my gas Whisper and found they are not made all that consistantly. How snug or loose they fit in the chamber varies quite a bit. And when I chony'd them, they have the greatest speed variance of any pellets I've tried so far. Accuracy is not good either.
All I see going for them is speed,.. and if you lucky enough to hit what your aiming at, more penitration. All for at least 6 times the cost of good quality lead pellets.
Paul.