One week review:
1.  It shoots the Federal crimped shells and the CCI shotshells equally well as far as I can see.
2.  The sparrow I thought I missed the other day didn't go far (found it laying in the yard), so I actually didn't miss.
3.  It is deadly on chipmunks.
4.  I was giving red squirrels a pass until I saw them going into my barn and up into the soffit.
5.  So, it is deadly on red squirrels.
6.  I am seeing a few starlings, but no shot opportunities.
Overall, I really like this gun, it is fun to shoot, and I would recommend it for taking care of yard pests.