I just ordered a box of Dynamics from AoA, I'll keep you posted, Dave. I'll be interested to see how they do as well, and I have 4 different guns to try them in. I have a similar issue to you, I pass up lots of shots because too many target zones are also chicken yard. Don't want any of "my girls" sucking up lead :-)! And it would net me that added advantage of getting the wife off my back about spraying lead around the property. If you have any .177 springers and would like to do a little testing yourself, I'd be happy to send you some.
One thing I read on the YF that was interesting. One guy said that when switching to the Dynamics, you need to do a thorough barrel cleaning first. He felt that lead residue in the barrel caused poor accuracy and inconsistent results with the tin pellets. He also said not to lube them, but I don't lube pellets anyway, not even when I was shooting PCP's. I'll need to test this out myself, if he's right, that means you shoot tin OR lead, but not both, or at least, not without some extra hassle. The Dynamics are way too expensive for casual plinking. Later.
Dave