Certainly the V-max is much more explosive than either the cci or the 20 grain XTP. I too love the little hummer, but I wouldn't call that over kill on a crow.
You should see what a 85 grain Sierra HPBT running over 3000 fps out of a .243 does to them..........it vaporizes them........you just see the "ghost" or red mist floating in the breeze........might find a wing.........and a few feathers.....
I do think the .17 HMR is one of the funnest guns I've shot in a very long time, and for me, fills my need for a low richochetting, fairly quiet round to dispatch varmits, crows and feral house cats now that urban sprawl has encroched on my used to be rual adobe...........