Just so ya' know , a .22 caliber 16gr hollow point w/ 14ftlb.s will penetrate quartering through a large squirrel at 12yrds 'AND go through both the thin plexiglass windows of a birdfeeder. I did a test on some scrap roof cap metal with the same setup ( don't know the gauge) & found a good dent that compromised the finish on the weather side. Just sayin'...
I once saw a video where a guy from new zealand (a professional pest controller) did shoot starlings and other pest birds inside a large factory, and he only used 4.5 - 6 ft lbs energy with .177 cal for them. It was a vulnerable area so he had to choose this low power, but it worked well on the pests.
H&N terminators @650-700 fps and have a beam or glancing shot, (this will go right through a full body shot by the way)you will be fine! Do your homework on range and remember a 20 yard shot mostly straight up is probably only a 10 yard shot so have your dope accordingly and understand your scope height and your hold over when you’re in a barn
that seems to screw a lot of people up
