.17 MACH 2 is quiet and will do the job at 70-100 yards. I think it would be better than the .22 Hornet IMHO.

Also, take a look at the Ruger .204. It's just a tough louder than the .17 MACH 2 but will touch up VERY accurately out to 250 or so. I love it for coyotes and foxes since the hole it leaves is so small keeping the value of the pelt up.

Any of the above have quality factory loads...