Interesting video..... My .22lr killing power experience goes no further that about 50-60 yards. Buddy of mine had a small meadow on his wooded property that he kept mowed. Got overrun with 'chucks. We used 22lr's annually to cull them anywhere from 20 -60 yards. Head shots did it every time. They penetrate woodchuck skulls out to at least 50 yards. Never did a test on pine boards although there was one spot there where I could get 100 yd. shots. That's where I used my .22 Hornet. Kind of wish I would have tried a 22lr out a bit further just out of curiosity.
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