Originally Posted by somawas
for a clean kill with the .22 WMR, it does a better job. I primarily use my .177 HMR at the range to punch holes in paper at 100 yards- I'm lazy at time and it takes a little less effort to hit the target at 100 yards with the .177.
I take it you've left wounded crows and squirrels in the woods while trying to use the 17HMR. I doubt it, both magnum rimfire rounds are overkill @ 100yds with these two animals as they can be easily dispatched with the average .177cal air rifle between 50-75yds. The 22Mag isn't going to make them more dead or kill them any faster than the 17HMR. People hunt prairie dogs out to 200yds and groundhogs out to 100yds with the 17HMR without a problem.
You may feel more confident with the 22mag, but both will easily do the job on crows and squirrels.